{"id":1051,"date":"2023-07-27T20:22:41","date_gmt":"2023-07-27T20:22:41","guid":{"rendered":"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/"},"modified":"2023-07-27T20:22:41","modified_gmt":"2023-07-27T20:22:41","slug":"correlacao-ponto-bisserial-excel","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/","title":{"rendered":"Como calcular a correla\u00e7\u00e3o ponto-bisserial no excel"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>A correla\u00e7\u00e3o ponto-bisserial<\/strong> \u00e9 usada para medir a rela\u00e7\u00e3o entre uma vari\u00e1vel bin\u00e1ria, x, e uma vari\u00e1vel cont\u00ednua, y.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Semelhante ao<\/span> <a href=\"https:\/\/statorials.org\/pt\/coeficiente-de-correlacao-de-pearson-1\/\" target=\"_blank\" rel=\"noopener noreferrer\">coeficiente de correla\u00e7\u00e3o de Pearson<\/a> <span style=\"color: #000000;\">, o coeficiente de correla\u00e7\u00e3o ponto-bisserial assume um valor entre -1 e 1 onde:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">-1 indica uma correla\u00e7\u00e3o perfeitamente negativa entre duas vari\u00e1veis<\/span><\/li>\n<li> <span style=\"color: #000000;\">0 indica nenhuma correla\u00e7\u00e3o entre duas vari\u00e1veis<\/span><\/li>\n<li> <span style=\"color: #000000;\">1 indica uma correla\u00e7\u00e3o perfeitamente positiva entre duas vari\u00e1veis<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Este tutorial explica como calcular a correla\u00e7\u00e3o ponto-bisserial entre duas vari\u00e1veis no Excel.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo: correla\u00e7\u00e3o ponto-bisserial no Excel<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos a seguinte vari\u00e1vel bin\u00e1ria, x, e uma vari\u00e1vel cont\u00ednua, y:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-10848 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pointbiexcel1.png\" alt=\"\" width=\"431\" height=\"403\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Para calcular a <strong>correla\u00e7\u00e3o ponto-bisserial<\/strong> entre x e y, podemos simplesmente usar a fun\u00e7\u00e3o <strong>=CORREL()<\/strong> da seguinte forma:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-10849 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pointbiexcel2.png\" alt=\"Correla\u00e7\u00e3o ponto-bisserial no Excel\" width=\"444\" height=\"383\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">A correla\u00e7\u00e3o ponto-bisserial entre xey \u00e9 <strong>0,218163<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Como esse n\u00famero \u00e9 positivo, isso indica que quando a vari\u00e1vel x assume o valor \u201c1\u201d, a vari\u00e1vel y tende a assumir valores maiores do que quando a vari\u00e1vel x assume o valor \u201c0\u201d.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos verificar isso facilmente calculando o valor m\u00e9dio de y quando x \u00e9 0 e quando x \u00e9 1:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-10850 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pointbiexcel3.png\" alt=\"Exemplo de correla\u00e7\u00e3o ponto-bisserial no Excel\" width=\"535\" height=\"356\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Quando x = 0, o valor m\u00e9dio de y \u00e9 <strong>14,2<\/strong> . Quando x = 1, o valor m\u00e9dio de y \u00e9 <strong>16,2<\/strong> . Isto confirma o fato de que a correla\u00e7\u00e3o ponto-bisserial entre as duas vari\u00e1veis deve ser positiva.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Tamb\u00e9m podemos usar as seguintes f\u00f3rmulas para calcular o valor p para este coeficiente de correla\u00e7\u00e3o:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-10851 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pointbiexcel4.png\" alt=\"Valor P para correla\u00e7\u00e3o ponto-bisserial no Excel\" width=\"576\" height=\"352\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">O valor p acaba sendo <strong>0,5193<\/strong> . Assim, embora o coeficiente de correla\u00e7\u00e3o entre as duas vari\u00e1veis seja ligeiramente positivo, verifica-se que n\u00e3o \u00e9 uma correla\u00e7\u00e3o estatisticamente significativa.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pt\/correlacao-de-classificacao-de-lanceiro-excel\/\" target=\"_blank\" rel=\"noopener noreferrer\">Como calcular a correla\u00e7\u00e3o de classifica\u00e7\u00e3o de Spearman no Excel<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/correlacao-parcial-excel\/\" target=\"_blank\" rel=\"noopener noreferrer\">Como calcular a correla\u00e7\u00e3o parcial no Excel<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/correlacao-de-valor-p-excel\/\" target=\"_blank\" rel=\"noopener noreferrer\">Como encontrar o valor P para um coeficiente de correla\u00e7\u00e3o no Excel<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A correla\u00e7\u00e3o ponto-bisserial \u00e9 usada para medir a rela\u00e7\u00e3o entre uma vari\u00e1vel bin\u00e1ria, x, e uma vari\u00e1vel cont\u00ednua, y. Semelhante ao coeficiente de correla\u00e7\u00e3o de Pearson , o coeficiente de correla\u00e7\u00e3o ponto-bisserial assume um valor entre -1 e 1 onde: -1 indica uma correla\u00e7\u00e3o perfeitamente negativa entre duas vari\u00e1veis 0 indica nenhuma correla\u00e7\u00e3o entre duas [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1051","post","type-post","status-publish","format-standard","hentry","category-guia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Como calcular a correla\u00e7\u00e3o ponto-bisserial no Excel<\/title>\n<meta name=\"description\" content=\"Uma explica\u00e7\u00e3o simples de como calcular a correla\u00e7\u00e3o ponto-bisserial no Excel, com um exemplo.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como calcular a correla\u00e7\u00e3o ponto-bisserial no Excel\" \/>\n<meta property=\"og:description\" content=\"Uma explica\u00e7\u00e3o simples de como calcular a correla\u00e7\u00e3o ponto-bisserial no Excel, com um exemplo.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T20:22:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pointbiexcel1.png\" \/>\n<meta name=\"author\" content=\"Dr. benjamim anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr. benjamim anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/\",\"url\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/\",\"name\":\"Como calcular a correla\u00e7\u00e3o ponto-bisserial no Excel\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-27T20:22:41+00:00\",\"dateModified\":\"2023-07-27T20:22:41+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Uma explica\u00e7\u00e3o simples de como calcular a correla\u00e7\u00e3o ponto-bisserial no Excel, com um exemplo.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-bisserial-excel\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como calcular a correla\u00e7\u00e3o ponto-bisserial no excel\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pt\/#website\",\"url\":\"https:\/\/statorials.org\/pt\/\",\"name\":\"Statorials\",\"description\":\"O seu guia para a literacia estat\u00edstica!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pt\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\",\"name\":\"Dr. benjamim anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Dr. benjamim anderson\"},\"description\":\"Ol\u00e1, sou Benjamin, um professor aposentado de estat\u00edstica que se tornou professor dedicado na Statorials. 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