{"id":748473,"date":"2021-05-24T00:27:29","date_gmt":"2021-05-24T03:27:29","guid":{"rendered":"https:\/\/www.estrategiaconcursos.com.br\/blog\/?p=748473"},"modified":"2023-09-20T11:15:58","modified_gmt":"2023-09-20T14:15:58","slug":"gabarito-pf-estatistica-agente-escrivao-e-papiloscopista","status":"publish","type":"post","link":"https:\/\/www.estrategiaconcursos.com.br\/blog\/gabarito-pf-estatistica-agente-escrivao-e-papiloscopista\/","title":{"rendered":"Gabarito PF Estat\u00edstica: Agente, Escriv\u00e3o e Papiloscopista"},"content":{"rendered":"\n<p>Ol\u00e1! Tudo bem?&nbsp;<\/p>\n\n\n\n<p>Como foi a prova da PF? A parte de estat\u00edstica veio bem pesada, n\u00e9? Ou voc\u00ea estava bem preparado?&nbsp;<\/p>\n\n\n\n<p>A seguir, o professor de Estat\u00edstica do Estrat\u00e9gia, Djefferson Maranh\u00e3o, e eu apresentamos os nossos coment\u00e1rios das quest\u00f5es 38 a 48. Atente-se aos enunciados, pois a ordem das quest\u00f5es em cada bloco pode ter sido diferente na sua prova.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"943\" height=\"260\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000830\/image-620.png\" alt=\"\" class=\"wp-image-748866\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000830\/image-620.png 943w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000830\/image-620-300x83.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000830\/image-620-768x212.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000830\/image-620-610x168.png 610w\" sizes=\"auto, (max-width: 943px) 100vw, 943px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"301\" height=\"60\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000910\/image-621.png\" alt=\"\" class=\"wp-image-748867\"\/><\/figure>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>O enunciado informa que a vari\u00e1vel \u00e9 cont\u00ednua. Para esse tipo de vari\u00e1vel, a probabilidade de ela assumir exatamente determinado valor \u00e9 nula:<\/p>\n\n\n\n<p>P(X = 5) = 0<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"578\" height=\"102\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001029\/image-623.png\" alt=\"\" class=\"wp-image-748869\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001029\/image-623.png 578w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001029\/image-623-300x53.png 300w\" sizes=\"auto, (max-width: 578px) 100vw, 578px\" \/><\/figure>\n\n\n\n<p><strong>Resposta: Errado.<\/strong><\/p>\n\n\n\n<p><strong>Quest\u00e3o 38<\/strong>. O valor esperado de X \u00e9 igual a 12.<\/p>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>O valor esperado de X \u00e9 dado por:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"80\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234327\/image-562.png\" alt=\"\" class=\"wp-image-748788\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234327\/image-562.png 315w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234327\/image-562-300x76.png 300w\" sizes=\"auto, (max-width: 315px) 100vw, 315px\" \/><\/figure>\n\n\n\n<p>Para isso, precisamos calcular o valor de&nbsp;<img loading=\"lazy\" decoding=\"async\" width=\"7\" height=\"14\" src=\"https:\/\/www.estrategiaconcursos.com.br\/96d65678-f005-434b-bf59-3a166f86cba5\"\/>, considerando-se que a probabilidade associada a todo o Espa\u00e7o Amostral (U) \u00e9 igual a 1. Como a vari\u00e1vel assume valor no intervalo&nbsp;[0,24) temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"945\" height=\"87\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234354\/image-563.png\" alt=\"\" class=\"wp-image-748789\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234354\/image-563.png 945w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234354\/image-563-300x28.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234354\/image-563-768x71.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234354\/image-563-610x56.png 610w\" sizes=\"auto, (max-width: 945px) 100vw, 945px\" \/><\/figure>\n\n\n\n<p>Calculando as integrais em separado (sem aplicar os limites), temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"495\" height=\"186\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234423\/image-564.png\" alt=\"\" class=\"wp-image-748790\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234423\/image-564.png 495w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234423\/image-564-300x113.png 300w\" sizes=\"auto, (max-width: 495px) 100vw, 495px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"74\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234526\/image-566.png\" alt=\"\" class=\"wp-image-748792\"\/><\/figure>\n\n\n\n<p>Juntando os termos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"655\" height=\"105\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234545\/image-567.png\" alt=\"\" class=\"wp-image-748793\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234545\/image-567.png 655w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234545\/image-567-300x48.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234545\/image-567-610x98.png 610w\" sizes=\"auto, (max-width: 655px) 100vw, 655px\" \/><\/figure>\n\n\n\n<p>Aplicando os limites da integral, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"345\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234623\/image-570-1024x345.png\" alt=\"\" class=\"wp-image-748796\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234623\/image-570-1024x345.png 1024w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234623\/image-570-300x101.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234623\/image-570-768x259.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234623\/image-570-610x205.png 610w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234623\/image-570.png 1036w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Observa\u00e7\u00e3o:&nbsp;Se, na express\u00e3o&nbsp;acima, voc\u00ea isolar&nbsp;24&#215;24, as contas ficam menores:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"997\" height=\"184\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234711\/image-573.png\" alt=\"\" class=\"wp-image-748799\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234711\/image-573.png 997w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234711\/image-573-300x55.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234711\/image-573-768x142.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234711\/image-573-610x113.png 610w\" sizes=\"auto, (max-width: 997px) 100vw, 997px\" \/><\/figure>\n\n\n\n<p>Portanto, conhecendo f(x), o valor esperado \u00e9 dado por:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"886\" height=\"97\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234722\/image-574.png\" alt=\"\" class=\"wp-image-748800\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234722\/image-574.png 886w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234722\/image-574-300x33.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234722\/image-574-768x84.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234722\/image-574-610x67.png 610w\" sizes=\"auto, (max-width: 886px) 100vw, 886px\" \/><\/figure>\n\n\n\n<p>Calculando as integrais em separado (sem aplicar os limites), temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"517\" height=\"316\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234757\/image-576.png\" alt=\"\" class=\"wp-image-748802\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234757\/image-576.png 517w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234757\/image-576-300x183.png 300w\" sizes=\"auto, (max-width: 517px) 100vw, 517px\" \/><\/figure>\n\n\n\n<p>Juntando os termos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234810\/image-577.png\" alt=\"\" class=\"wp-image-748803\" style=\"width:723px;height:110px\" width=\"723\" height=\"110\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234810\/image-577.png 723w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234810\/image-577-300x46.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234810\/image-577-610x93.png 610w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p>Aplicando os limites da integral, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1001\" height=\"255\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234917\/image-580.png\" alt=\"\" class=\"wp-image-748807\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234917\/image-580.png 1001w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234917\/image-580-300x76.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234917\/image-580-768x196.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23234917\/image-580-610x155.png 610w\" sizes=\"auto, (max-width: 1001px) 100vw, 1001px\" \/><\/figure>\n\n\n\n<p>Observa\u00e7\u00e3o: Similarmente ao que fizemos antes, se voc\u00ea isolar 24x24x24&nbsp;na express\u00e3o&nbsp;acima, as contas simplificam:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"78\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235021\/image-582-1024x78.png\" alt=\"\" class=\"wp-image-748809\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235021\/image-582-1024x78.png 1024w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235021\/image-582-300x23.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235021\/image-582-768x59.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235021\/image-582-610x47.png 610w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235021\/image-582.png 1084w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"419\" height=\"79\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235030\/image-584.png\" alt=\"\" class=\"wp-image-748811\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235030\/image-584.png 419w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235030\/image-584-300x57.png 300w\" sizes=\"auto, (max-width: 419px) 100vw, 419px\" \/><\/figure>\n\n\n\n<p><strong>Resposta: Certo.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"582\" height=\"36\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001304\/image-624.png\" alt=\"\" class=\"wp-image-748871\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001304\/image-624.png 582w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001304\/image-624-300x19.png 300w\" sizes=\"auto, (max-width: 582px) 100vw, 582px\" \/><\/figure>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>Na quest\u00e3o anterior, vimos que a constante \u00e9:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"304\" height=\"87\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235115\/image-586.png\" alt=\"\" class=\"wp-image-748814\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235115\/image-586.png 304w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235115\/image-586-300x86.png 300w\" sizes=\"auto, (max-width: 304px) 100vw, 304px\" \/><\/figure>\n\n\n\n<p>Ou seja,&nbsp;\u00e9 inferior a 0,01.<\/p>\n\n\n\n<p><strong>Resposta: Certo.<\/strong><\/p>\n\n\n\n<p><strong>Considere que X e Y sejam vari\u00e1veis aleat\u00f3rias cont\u00ednuas que se distribuem conjuntamente conforme a fun\u00e7\u00e3o de densidade<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"239\" height=\"60\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235201\/image-587.png\" alt=\"\" class=\"wp-image-748815\"\/><\/figure>\n\n\n\n<p><strong>Na qual<\/strong> 0&lt;x&lt;1 e 0&lt;y&lt;1<\/p>\n\n\n\n<p><strong>Com base nessas informa\u00e7\u00f5es, julgue os itens seguintes.<\/strong><\/p>\n\n\n\n<p><strong>Quest\u00e3o 40<\/strong>. X e Y s\u00e3o vari\u00e1veis aleat\u00f3rias independentes.<\/p>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>Duas vari\u00e1veis cont\u00ednuas s\u00e3o independentes quando a fun\u00e7\u00e3o densidade de probabilidade conjunta,&nbsp;f(x,y), \u00e9 o produto das fun\u00e7\u00f5es densidade de probabilidade marginal das vari\u00e1veis:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"303\" height=\"79\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235248\/image-588.png\" alt=\"\" class=\"wp-image-748816\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235248\/image-588.png 303w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235248\/image-588-300x78.png 300w\" sizes=\"auto, (max-width: 303px) 100vw, 303px\" \/><\/figure>\n\n\n\n<p>Ou seja, precisamos calcular as fun\u00e7\u00f5es densidade de probabilidade marginal das vari\u00e1veis. A fun\u00e7\u00e3o marginal de x \u00e9 dada por:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"303\" height=\"111\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235308\/image-589.png\" alt=\"\" class=\"wp-image-748817\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235308\/image-589.png 303w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235308\/image-589-300x110.png 300w\" sizes=\"auto, (max-width: 303px) 100vw, 303px\" \/><\/figure>\n\n\n\n<p>Aqui, estamos integrando em rela\u00e7\u00e3o a&nbsp;y, ou seja,&nbsp;x&nbsp;\u00e9 considerada constante. Calculando a integral, sem considerar os limites, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"741\" height=\"99\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235318\/image-590.png\" alt=\"\" class=\"wp-image-748818\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235318\/image-590.png 741w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235318\/image-590-300x40.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235318\/image-590-610x81.png 610w\" sizes=\"auto, (max-width: 741px) 100vw, 741px\" \/><\/figure>\n\n\n\n<p>Aplicando os limites,temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"756\" height=\"135\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235353\/image-591.png\" alt=\"\" class=\"wp-image-748823\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235353\/image-591.png 756w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235353\/image-591-300x54.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235353\/image-591-610x109.png 610w\" sizes=\"auto, (max-width: 756px) 100vw, 756px\" \/><\/figure>\n\n\n\n<p>A fun\u00e7\u00e3o marginal de&nbsp;y \u00e9 dada por:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"293\" height=\"106\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235404\/image-592.png\" alt=\"\" class=\"wp-image-748824\"\/><\/figure>\n\n\n\n<p>Ou seja, temos uma integral em rela\u00e7\u00e3o a&nbsp;x, em que consideramos&nbsp;y&nbsp;constante. Calculando a integral, sem considerar os limites, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"691\" height=\"93\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235415\/image-593.png\" alt=\"\" class=\"wp-image-748825\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235415\/image-593.png 691w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235415\/image-593-300x40.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235415\/image-593-610x82.png 610w\" sizes=\"auto, (max-width: 691px) 100vw, 691px\" \/><\/figure>\n\n\n\n<p>Aplicando os limites, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"642\" height=\"123\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235448\/image-594.png\" alt=\"\" class=\"wp-image-748826\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235448\/image-594.png 642w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235448\/image-594-300x57.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235448\/image-594-610x117.png 610w\" sizes=\"auto, (max-width: 642px) 100vw, 642px\" \/><\/figure>\n\n\n\n<p>O produto das fun\u00e7\u00f5es marginais \u00e9:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"912\" height=\"83\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235513\/image-596.png\" alt=\"\" class=\"wp-image-748828\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235513\/image-596.png 912w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235513\/image-596-300x27.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235513\/image-596-768x70.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235513\/image-596-610x56.png 610w\" sizes=\"auto, (max-width: 912px) 100vw, 912px\" \/><\/figure>\n\n\n\n<p>Podemos observar que essa fun\u00e7\u00e3o \u00e9&nbsp;<strong>diferente<\/strong>&nbsp;da fun\u00e7\u00e3o densidade conjunta fornecida. Por esse motivo, as vari\u00e1veis&nbsp;<strong>n\u00e3o<\/strong>&nbsp;s\u00e3o independentes.<\/p>\n\n\n\n<p><strong>Resposta: Errado.<\/strong><\/p>\n\n\n\n<p><strong>Quest\u00e3o 41<\/strong>. Y \u00e9 uma vari\u00e1vel uniforme no intervalo (0,1)<\/p>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>Na quest\u00e3o anterior, calculamos que a fun\u00e7\u00e3o densidade marginal de y \u00e9:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"172\" height=\"86\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235553\/image-597.png\" alt=\"\" class=\"wp-image-748831\"\/><\/figure>\n\n\n\n<p>Ou seja, quando&nbsp;y=0 a fun\u00e7\u00e3o \u00e9&nbsp;f(y)=1\/2&nbsp;e quando&nbsp;y=1&nbsp;a fun\u00e7\u00e3o \u00e9&nbsp;f(y)=1+1\/2=3\/2. Logo, o valor da fun\u00e7\u00e3o varia, n\u00e3o sendo, portanto, uniforme.<\/p>\n\n\n\n<p><strong>Resposta: Errado.<\/strong><strong><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"388\" height=\"57\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001529\/image-625.png\" alt=\"\" class=\"wp-image-748872\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001529\/image-625.png 388w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001529\/image-625-300x44.png 300w\" sizes=\"auto, (max-width: 388px) 100vw, 388px\" \/><\/figure>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>A quest\u00e3o est\u00e1 pedindo pela esperan\u00e7a de Y condicionada a&nbsp;X=1\/2. Antes de entrar nos c\u00e1lculos, podemos aplicar a propriedade aditiva da integral para facilitar as nossas contas:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"540\" height=\"98\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235633\/image-598.png\" alt=\"\" class=\"wp-image-748833\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235633\/image-598.png 540w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235633\/image-598-300x54.png 300w\" sizes=\"auto, (max-width: 540px) 100vw, 540px\" \/><\/figure>\n\n\n\n<p>Sabendo que&nbsp;&nbsp;x=1\/2, a esperan\u00e7a de X \u00e9&nbsp;igual a 1\/2:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"423\" height=\"81\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235711\/image-599.png\" alt=\"\" class=\"wp-image-748834\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235711\/image-599.png 423w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235711\/image-599-300x57.png 300w\" sizes=\"auto, (max-width: 423px) 100vw, 423px\" \/><\/figure>\n\n\n\n<p>A esperan\u00e7a de Y,&nbsp;condicionada a X = x, \u00e9 dada por:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"414\" height=\"79\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235718\/image-600.png\" alt=\"\" class=\"wp-image-748835\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235718\/image-600.png 414w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235718\/image-600-300x57.png 300w\" sizes=\"auto, (max-width: 414px) 100vw, 414px\" \/><\/figure>\n\n\n\n<p>Em que&nbsp;f(y|x)&nbsp;\u00e9 a fun\u00e7\u00e3o densidade de Y condicionada a X, que \u00e9 a raz\u00e3o entre a fun\u00e7\u00e3o densidade conjunta e a fun\u00e7\u00e3o marginal de x:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"305\" height=\"88\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235749\/image-601.png\" alt=\"\" class=\"wp-image-748840\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235749\/image-601.png 305w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235749\/image-601-300x87.png 300w\" sizes=\"auto, (max-width: 305px) 100vw, 305px\" \/><\/figure>\n\n\n\n<p>J\u00e1 calculamos&nbsp;f(x)=x+1\/2, ent\u00e3o, o valor de&nbsp;f(X=1\/2)&nbsp;\u00e9:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"277\" height=\"84\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235801\/image-602.png\" alt=\"\" class=\"wp-image-748841\"\/><\/figure>\n\n\n\n<p>Portanto, a fun\u00e7\u00e3o de Y condicionada a&nbsp;X=1\/2&nbsp;\u00e9:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"381\" height=\"85\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235839\/image-603.png\" alt=\"\" class=\"wp-image-748842\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235839\/image-603.png 381w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235839\/image-603-300x67.png 300w\" sizes=\"auto, (max-width: 381px) 100vw, 381px\" \/><\/figure>\n\n\n\n<p>Agora, podemos calcular a esperan\u00e7a de Y condicionada a&nbsp;X=1\/2:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"615\" height=\"115\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235854\/image-604.png\" alt=\"\" class=\"wp-image-748844\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235854\/image-604.png 615w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235854\/image-604-300x56.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235854\/image-604-610x114.png 610w\" sizes=\"auto, (max-width: 615px) 100vw, 615px\" \/><\/figure>\n\n\n\n<p>Calculando as integrais em separado, sem considerar os limites, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"473\" height=\"212\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235907\/image-605.png\" alt=\"\" class=\"wp-image-748845\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235907\/image-605.png 473w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235907\/image-605-300x134.png 300w\" sizes=\"auto, (max-width: 473px) 100vw, 473px\" \/><\/figure>\n\n\n\n<p>Juntando as express\u00f5es, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"390\" height=\"88\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235942\/image-606.png\" alt=\"\" class=\"wp-image-748846\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235942\/image-606.png 390w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/23235942\/image-606-300x68.png 300w\" sizes=\"auto, (max-width: 390px) 100vw, 390px\" \/><\/figure>\n\n\n\n<p>Aplicando os limites, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"98\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000001\/image-607.png\" alt=\"\" class=\"wp-image-748847\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000001\/image-607.png 830w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000001\/image-607-300x35.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000001\/image-607-768x91.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000001\/image-607-610x72.png 610w\" sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/figure>\n\n\n\n<p>Por fim, somamos&nbsp;E(X|X=1\/2)&nbsp;para obter&nbsp;E(X+Y|X=1\/2):<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"608\" height=\"94\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000030\/image-608.png\" alt=\"\" class=\"wp-image-748848\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000030\/image-608.png 608w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000030\/image-608-300x46.png 300w\" sizes=\"auto, (max-width: 608px) 100vw, 608px\" \/><\/figure>\n\n\n\n<p>O resultado \u00e9 diferente de&nbsp;14\/12.<\/p>\n\n\n\n<p><strong>Resposta: Errado.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"978\" height=\"410\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002613\/image-630.png\" alt=\"\" class=\"wp-image-748880\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002613\/image-630.png 978w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002613\/image-630-300x126.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002613\/image-630-768x322.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002613\/image-630-610x256.png 610w\" sizes=\"auto, (max-width: 978px) 100vw, 978px\" \/><\/figure>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>Uma estat\u00edstica \u00e9 considerada suficiente quando&nbsp;se ela captura, a partir da amostra obtida,&nbsp;<strong>toda a informa\u00e7\u00e3o poss\u00edvel sobre o par\u00e2metro populacional desconhecido<\/strong>, de modo que qualquer outra informa\u00e7\u00e3o n\u00e3o contribuir\u00e1 com a estima\u00e7\u00e3o do par\u00e2metro populacional.&nbsp;<\/p>\n\n\n\n<p>Considerando que o enunciado forneceu a fun\u00e7\u00e3o de distribui\u00e7\u00e3o acumulada, o par\u00e2metro&nbsp;pode ser estimado a partir da mediana da distribui\u00e7\u00e3o,&nbsp;a fun\u00e7\u00e3o de distribui\u00e7\u00e3o acumulada \u00e9 igual a 0,5:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"421\" height=\"93\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000109\/image-609.png\" alt=\"\" class=\"wp-image-748849\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000109\/image-609.png 421w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000109\/image-609-300x66.png 300w\" sizes=\"auto, (max-width: 421px) 100vw, 421px\" \/><\/figure>\n\n\n\n<p>A partir dessa equa\u00e7\u00e3o, \u00e9 poss\u00edvel calcular o valor do par\u00e2metro&nbsp;<img loading=\"lazy\" decoding=\"async\" width=\"8\" height=\"14\" src=\"https:\/\/www.estrategiaconcursos.com.br\/a32fbc88-a004-432c-b26b-05888030acae\"\/>. Ou seja, precisamos da mediana da distribui\u00e7\u00e3o, e n\u00e3o da m\u00e9dia. Portanto, a m\u00e9dia n\u00e3o \u00e9 uma estat\u00edstica suficiente para estimar esse par\u00e2metro.<\/p>\n\n\n\n<p><strong>Resposta: Errado.<\/strong><\/p>\n\n\n\n<p><strong>Quest\u00e3o 44<\/strong>. Pelo m\u00e9todo dos m\u00ednimos quadrados ordin\u00e1rios, a estimativa da m\u00e9dia populacional \u00e9 igual ou superior a 3,5.&nbsp;<\/p>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>A estimativa da m\u00e9dia populacional pelo m\u00e9todo dos m\u00ednimos quadrados \u00e9 a m\u00e9dia amostral, dada por:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"605\" height=\"93\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000145\/image-610.png\" alt=\"\" class=\"wp-image-748850\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000145\/image-610.png 605w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000145\/image-610-300x46.png 300w\" sizes=\"auto, (max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<p>Como 3,84 \u00e9 superior a 3,5, o item est\u00e1 certo.<\/p>\n\n\n\n<p><strong>Resposta: Certo.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"950\" height=\"71\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001841\/image-626.png\" alt=\"\" class=\"wp-image-748873\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001841\/image-626.png 950w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001841\/image-626-300x22.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001841\/image-626-768x57.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24001841\/image-626-610x46.png 610w\" sizes=\"auto, (max-width: 950px) 100vw, 950px\" \/><\/figure>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>Agora, vamos voltar ao c\u00e1lculo da mediana, utilizando a estimativa da mediana observada. Para isso, vamos ordenar os valores observados:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>3,1<\/td><td>3,5<\/td><td>3,5<\/td><td>3,8<\/td><td>5,3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Podemos observar que a mediana \u00e9&nbsp;igual a 3,5, logo:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000225\/image-611.png\" alt=\"\" class=\"wp-image-748851\" style=\"width:280px;height:52px\" width=\"280\" height=\"52\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"223\" height=\"195\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000246\/image-612.png\" alt=\"\" class=\"wp-image-748852\"\/><\/figure>\n\n\n\n<p>Portanto,&nbsp;o par\u00e2metro \u00e9 inferior a 3,5<\/p>\n\n\n\n<p><strong>Resposta: Errado.<\/strong><\/p>\n\n\n\n<p><strong>Um estudo objetivou avaliar a evolu\u00e7\u00e3o do n\u00famero mensal Y de milhares de ocorr\u00eancias de certo tipo de crime em determinado ano. Com base no m\u00e9todo dos m\u00ednimos quadrados ordin\u00e1rios, esse estudo apresentou um modelo de regress\u00e3o linear simples de forma<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"42\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000316\/image-613.png\" alt=\"\" class=\"wp-image-748853\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"935\" height=\"68\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002035\/image-627.png\" alt=\"\" class=\"wp-image-748874\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002035\/image-627.png 935w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002035\/image-627-300x22.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002035\/image-627-768x56.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002035\/image-627-610x44.png 610w\" sizes=\"auto, (max-width: 935px) 100vw, 935px\" \/><\/figure>\n\n\n\n<p><strong>Os erros padr\u00e3o das estimativas dos coeficientes desse modelo, as raz\u00f5es t e seus respectivos p-valores encontram-se na tabela a seguir:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>&nbsp;<\/strong><\/td><td><strong>erro padr\u00e3o<\/strong><\/td><td><strong>raz\u00e3o&nbsp;<\/strong><img loading=\"lazy\" decoding=\"async\" width=\"5\" height=\"14\" src=\"https:\/\/www.estrategiaconcursos.com.br\/08400177-ed50-41f0-a223-7231406a0eee\"\/><strong><\/strong><\/td><td><strong>p-valor<\/strong><\/td><\/tr><tr><td><strong>intercepto<\/strong><\/td><td>0,584<\/td><td>8,547<\/td><td>0,00<\/td><\/tr><tr><td><strong>coeficiente angular<\/strong><\/td><td>0,064<\/td><td>1,563<\/td><td>0,15<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Os desvios padr\u00e3o amostrais das vari\u00e1veis&nbsp;<\/strong>Y<strong>e&nbsp;T&nbsp;foram, respectivamente, 1 e 3,6.<\/strong><\/p>\n\n\n\n<p><strong>Com base nessas informa\u00e7\u00f5es, julgue os itens a seguir.<\/strong><\/p>\n\n\n\n<p><strong>Quest\u00e3o 46<\/strong>. Se a m\u00e9dia amostral da vari\u00e1vel&nbsp;T&nbsp;for igual a 6,5, ent\u00e3o a m\u00e9dia amostral da vari\u00e1vel&nbsp;Y ser\u00e1 igual a 4,35 mil ocorr\u00eancias.<\/p>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"951\" height=\"80\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002147\/image-628.png\" alt=\"\" class=\"wp-image-748875\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002147\/image-628.png 951w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002147\/image-628-300x25.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002147\/image-628-768x65.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002147\/image-628-610x51.png 610w\" sizes=\"auto, (max-width: 951px) 100vw, 951px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"166\" height=\"150\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000353\/image-614.png\" alt=\"\" class=\"wp-image-748856\"\/><\/figure>\n\n\n\n<p><strong>Resposta: Certo.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"944\" height=\"183\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002221\/image-629.png\" alt=\"\" class=\"wp-image-748876\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002221\/image-629.png 944w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002221\/image-629-300x58.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002221\/image-629-768x149.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24002221\/image-629-610x118.png 610w\" sizes=\"auto, (max-width: 944px) 100vw, 944px\" \/><\/figure>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>De fato, como o p-valor da estimativa do coeficiente angular \u00e9 maior que o n\u00edvel de signific\u00e2ncia (0,15 &gt; 0,05), n\u00e3o temos evid\u00eancias estat\u00edsticas suficientes para rejeitar a hip\u00f3tese nula.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"392\" height=\"42\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000519\/image-617.png\" alt=\"\" class=\"wp-image-748861\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000519\/image-617.png 392w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000519\/image-617-300x32.png 300w\" sizes=\"auto, (max-width: 392px) 100vw, 392px\" \/><\/figure>\n\n\n\n<p><strong>Gabarito: Certo.<\/strong><\/p>\n\n\n\n<p><strong>Quest\u00e3o 48<\/strong>. A correla\u00e7\u00e3o linear entre as vari\u00e1veis&nbsp;Y&nbsp;e&nbsp;T&nbsp;foi igual a -0,1.<\/p>\n\n\n\n<p><strong>Coment\u00e1rios:<\/strong><\/p>\n\n\n\n<p>A estimativa de&nbsp;beta, pelo m\u00e9todo dos m\u00ednimos quadrados, \u00e9 dada pela express\u00e3o:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"511\" height=\"67\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000439\/image-615.png\" alt=\"\" class=\"wp-image-748859\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000439\/image-615.png 511w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000439\/image-615-300x39.png 300w\" sizes=\"auto, (max-width: 511px) 100vw, 511px\" \/><\/figure>\n\n\n\n<p>Vamos relacionar essa express\u00e3o com a do coeficiente de correla\u00e7\u00e3o:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"291\" height=\"225\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000452\/image-616.png\" alt=\"\" class=\"wp-image-748860\"\/><\/figure>\n\n\n\n<p>Assim, conclu\u00edmos que o coeficiente de correla\u00e7\u00e3o pode ser expresso por meio da seguinte rela\u00e7\u00e3o:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"55\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000546\/image-618.png\" alt=\"\" class=\"wp-image-748862\"\/><\/figure>\n\n\n\n<p>Logo, temos o seguinte coeficiente de correla\u00e7\u00e3o:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"227\" height=\"61\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/05\/24000558\/image-619.png\" alt=\"\" class=\"wp-image-748863\"\/><\/figure>\n\n\n\n<p><strong>Gabarito: Errado.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ol\u00e1! Tudo bem?&nbsp; Como foi a prova da PF? A parte de estat\u00edstica veio bem pesada, n\u00e9? Ou voc\u00ea estava bem preparado?&nbsp; A seguir, o professor de Estat\u00edstica do Estrat\u00e9gia, Djefferson Maranh\u00e3o, e eu apresentamos os nossos coment\u00e1rios das quest\u00f5es 38 a 48. Atente-se aos enunciados, pois a ordem das quest\u00f5es em cada bloco pode [&hellip;]<\/p>\n","protected":false},"author":2036,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"post_tipo":"article","footnotes":""},"categories":[1],"tags":[],"tax_estado":[219963],"class_list":["post-748473","post","type-post","status-publish","format-standard","hentry","category-cursos-e-concursos","tax_estado-concursos-federais"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Gabarito PF Estat\u00edstica: Agente, Escriv\u00e3o e Papiloscopista<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.estrategiaconcursos.com.br\/blog\/gabarito-pf-estatistica-agente-escrivao-e-papiloscopista\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gabarito PF Estat\u00edstica: Agente, Escriv\u00e3o e Papiloscopista\" \/>\n<meta property=\"og:description\" content=\"Ol\u00e1! Tudo bem?&nbsp; Como foi a prova da PF? A parte de estat\u00edstica veio bem pesada, n\u00e9? Ou voc\u00ea estava bem preparado?&nbsp; A seguir, o professor de Estat\u00edstica do Estrat\u00e9gia, Djefferson Maranh\u00e3o, e eu apresentamos os nossos coment\u00e1rios das quest\u00f5es 38 a 48. 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