{"id":3600,"date":"2023-07-16T14:58:19","date_gmt":"2023-07-16T14:58:19","guid":{"rendered":"https:\/\/statorials.org\/pt\/relatorio-de-variacao-de-teste-do-excel\/"},"modified":"2023-07-16T14:58:19","modified_gmt":"2023-07-16T14:58:19","slug":"relatorio-de-variacao-de-teste-do-excel","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/relatorio-de-variacao-de-teste-do-excel\/","title":{"rendered":"Como realizar um teste de raz\u00e3o de vari\u00e2ncia no excel"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Um <strong>teste de raz\u00e3o de vari\u00e2ncia<\/strong> \u00e9 usado para testar se duas vari\u00e2ncias populacionais s\u00e3o iguais ou n\u00e3o.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este teste usa as seguintes hip\u00f3teses nulas e alternativas:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>H <sub>0<\/sub><\/strong> : As vari\u00e2ncias populacionais s\u00e3o iguais<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong><sub>HA<\/sub><\/strong> : As varia\u00e7\u00f5es populacionais n\u00e3o s\u00e3o iguais<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Para realizar este teste, calculamos a seguinte estat\u00edstica de teste:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>F<\/strong> =s <sub>1<\/sub> <sup>2<\/sup> \/s <sub>2<\/sub> <sup>2<\/sup><\/span><\/p>\n<p> <span style=\"color: #000000;\">Ouro:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>s <sub>1<\/sub> <sup>2<\/sup><\/strong> : A vari\u00e2ncia amostral do primeiro grupo<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>s <sub>2<\/sub> <sup>2<\/sup><\/strong> : A vari\u00e2ncia amostral do segundo grupo<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Se o <a href=\"https:\/\/statorials.org\/pt\/p-valores-significancia-estatistica\/\" target=\"_blank\" rel=\"noopener\">valor p<\/a> que corresponde a esta estat\u00edstica do teste F estiver abaixo de um determinado limite (por exemplo, 0,05), ent\u00e3o rejeitamos a hip\u00f3tese nula e conclu\u00edmos que as vari\u00e2ncias populacionais n\u00e3o s\u00e3o iguais.<\/span><\/p>\n<p> <span style=\"color: #000000;\">O exemplo passo a passo a seguir mostra como realizar um teste de raz\u00e3o de vari\u00e2ncia no Excel.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Passo 1: Insira os dados<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Suponha que queiramos saber se duas esp\u00e9cies de plantas diferentes t\u00eam a mesma varia\u00e7\u00e3o de altura.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Para testar isso, coletamos uma <a href=\"https:\/\/statorials.org\/pt\/metodos-de-amostragem\/\" target=\"_blank\" rel=\"noopener noreferrer\">amostra aleat\u00f3ria simples<\/a> de 15 plantas de cada esp\u00e9cie.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Primeiro, inseriremos as alturas de cada esp\u00e9cie:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-29670 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/vartest1.jpg\" alt=\"\" width=\"426\" height=\"483\" srcset=\"\" sizes=\"auto, \"><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Etapa 2: calcular a estat\u00edstica do teste F<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">A seguir, digitaremos a seguinte f\u00f3rmula na c\u00e9lula <strong>E1<\/strong> para calcular a estat\u00edstica do teste F:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 17px;\"> <strong>=VAR.S( <span style=\"color: #3366ff;\">A2:A16<\/span> )\/VAR.S( <span style=\"color: #ff0000;\">B2:B16<\/span> )<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-29671 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/vartest2.jpg\" alt=\"\" width=\"501\" height=\"439\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">A estat\u00edstica do teste F \u00e9 <strong>0,437178<\/strong> .<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Etapa 3: Calcule o valor P<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">A seguir, digitaremos a seguinte f\u00f3rmula na c\u00e9lula <strong>E2<\/strong> para calcular o valor p que corresponde \u00e0 estat\u00edstica do teste F:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 17px;\"> <strong>=F.DIST( <span style=\"color: #3366ff;\">E1<\/span> , COUNT( <span style=\"color: #ff0000;\">A2:A16<\/span> )-1, COUNT( <span style=\"color: #800080;\">B2:B16<\/span> )-1, TRUE)*2<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-29672\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/vartest3.jpg\" alt=\"testando a taxa de vari\u00e2ncia no Excel\" width=\"644\" height=\"540\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : Na f\u00f3rmula, multiplicamos por 2 no final para produzir um valor p bicaudal.<\/span><\/p>\n<p> <span style=\"color: #000000;\">O valor p acaba sendo <strong>0,133596<\/strong> .<\/span><\/p>\n<p data-slot-rendered-dynamic=\"true\"> <span style=\"color: #000000;\">Recordemos as hip\u00f3teses nula e alternativa deste teste:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>H <sub>0<\/sub><\/strong> : As vari\u00e2ncias populacionais s\u00e3o iguais<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong><sub>HA<\/sub><\/strong> : As varia\u00e7\u00f5es populacionais n\u00e3o s\u00e3o iguais<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Como o valor p do nosso teste <strong>(0,133596)<\/strong> n\u00e3o \u00e9 inferior a 0,05, n\u00e3o conseguimos rejeitar a hip\u00f3tese nula.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Isto significa que n\u00e3o temos evid\u00eancias suficientes para concluir que a varia\u00e7\u00e3o na altura das plantas entre as duas esp\u00e9cies \u00e9 desigual.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir explicam como realizar outras tarefas comuns no Excel:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/teste-de-correlacao-no-excel\/\" target=\"_blank\" rel=\"noopener\">Como realizar um teste de correla\u00e7\u00e3o no Excel<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/teste-t-de-welchs-excel\/\" target=\"_blank\" rel=\"noopener\">Como realizar o teste t de Welch no Excel<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/teste-de-excel-kolmogorov-smirnov\/\" target=\"_blank\" rel=\"noopener\">Como realizar um teste Kolmogorov-Smirnov no Excel<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Um teste de raz\u00e3o de vari\u00e2ncia \u00e9 usado para testar se duas vari\u00e2ncias populacionais s\u00e3o iguais ou n\u00e3o. Este teste usa as seguintes hip\u00f3teses nulas e alternativas: H 0 : As vari\u00e2ncias populacionais s\u00e3o iguais HA : As varia\u00e7\u00f5es populacionais n\u00e3o s\u00e3o iguais Para realizar este teste, calculamos a seguinte estat\u00edstica de teste: F =s [&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-3600","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 realizar um teste de raz\u00e3o de vari\u00e2ncia no Excel \u2013 Estatologia<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como realizar um teste de raz\u00e3o de vari\u00e2ncia no Excel, com um exemplo passo a passo.\" \/>\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\/relatorio-de-variacao-de-teste-do-excel\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como realizar um teste de raz\u00e3o de vari\u00e2ncia no Excel \u2013 Estatologia\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como realizar um teste de raz\u00e3o de vari\u00e2ncia no Excel, com um exemplo passo a passo.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/relatorio-de-variacao-de-teste-do-excel\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-16T14:58:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/vartest1.jpg\" \/>\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\/relatorio-de-variacao-de-teste-do-excel\/\",\"url\":\"https:\/\/statorials.org\/pt\/relatorio-de-variacao-de-teste-do-excel\/\",\"name\":\"Como realizar um teste de raz\u00e3o de vari\u00e2ncia no Excel \u2013 Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-16T14:58:19+00:00\",\"dateModified\":\"2023-07-16T14:58:19+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como realizar um teste de raz\u00e3o de vari\u00e2ncia no Excel, com um exemplo passo a passo.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/relatorio-de-variacao-de-teste-do-excel\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/relatorio-de-variacao-de-teste-do-excel\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/relatorio-de-variacao-de-teste-do-excel\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como realizar um teste de raz\u00e3o de vari\u00e2ncia 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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