{"id":883,"date":"2023-07-28T10:40:30","date_gmt":"2023-07-28T10:40:30","guid":{"rendered":"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/"},"modified":"2023-07-28T10:40:30","modified_gmt":"2023-07-28T10:40:30","slug":"correlacao-ponto-biserial-python","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/","title":{"rendered":"Como calcular a correla\u00e7\u00e3o ponto-bisserial em python"},"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 <a href=\"https:\/\/statorials.org\/pt\/coeficiente-de-correlacao-de-pearson-1\/\" target=\"_blank\" rel=\"noopener\">coeficiente de correla\u00e7\u00e3o de Pearson<\/a> , 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 em Python.<\/span><\/p>\n<h3> <strong><span style=\"color: #000000;\">Exemplo: correla\u00e7\u00e3o ponto-bisserial em Python<\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos uma vari\u00e1vel bin\u00e1ria, x, e uma vari\u00e1vel cont\u00ednua, y:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>x = [0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0]\ny = [12, 14, 17, 17, 11, 22, 23, 11, 19, 8, 12]\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Podemos usar a fun\u00e7\u00e3o <a href=\"https:\/\/docs.scipy.org\/doc\/scipy\/reference\/generated\/scipy.stats.pointbiserialr.html\" target=\"_blank\" rel=\"noopener\">pointbiserialr()<\/a> da biblioteca scipy.stats para calcular a correla\u00e7\u00e3o ponto-bisserial entre as duas vari\u00e1veis.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe que esta fun\u00e7\u00e3o retorna um coeficiente de correla\u00e7\u00e3o junto com um valor p correspondente:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #107d3f;\">import<\/span> scipy.stats <span style=\"color: #107d3f;\">as<\/span> stats\n\n<span style=\"color: #008080;\">#calculate point-biserial correlation<\/span>\nstats. <span style=\"color: #3366ff;\">pointbiserialr<\/span> (x,y)\n\nPointbiserialrResult(correlation=0.21816, pvalue=0.51928)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">O coeficiente de correla\u00e7\u00e3o ponto-bisserial \u00e9 <strong>0,21816<\/strong> e o valor p correspondente \u00e9 <strong>0,51928<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Como o coeficiente de correla\u00e7\u00e3o \u00e9 positivo, isso indica que quando a vari\u00e1vel x assume o valor \u201c1\u201d, a vari\u00e1vel y tende a assumir valores mais elevados do que quando a vari\u00e1vel x assume o valor \u201c0\u201d.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Como o valor p desta correla\u00e7\u00e3o n\u00e3o \u00e9 inferior a 0,05, esta correla\u00e7\u00e3o n\u00e3o \u00e9 estatisticamente significativa.<\/span><\/p>\n<p> <em><span style=\"color: #000000;\">Voc\u00ea pode encontrar os detalhes exatos de como essa correla\u00e7\u00e3o \u00e9 calculada na<\/span> <span style=\"color: #000000;\"><a href=\"https:\/\/docs.scipy.org\/doc\/scipy\/reference\/generated\/scipy.stats.pointbiserialr.html\" target=\"_blank\" rel=\"noopener\">documenta\u00e7\u00e3o<\/a> do scipy.stats.<\/span><\/em><\/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-883","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 em Python - Estatologia<\/title>\n<meta name=\"description\" content=\"Uma explica\u00e7\u00e3o simples de como calcular a correla\u00e7\u00e3o ponto-bisserial em Python.\" \/>\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-biserial-python\/\" \/>\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 em Python - Estatologia\" \/>\n<meta property=\"og:description\" content=\"Uma explica\u00e7\u00e3o simples de como calcular a correla\u00e7\u00e3o ponto-bisserial em Python.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T10:40:30+00:00\" \/>\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=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/\",\"url\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/\",\"name\":\"Como calcular a correla\u00e7\u00e3o ponto-bisserial em Python - Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-28T10:40:30+00:00\",\"dateModified\":\"2023-07-28T10:40:30+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 em Python.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/correlacao-ponto-biserial-python\/#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 em python\"}]},{\"@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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