{"id":1439,"date":"2023-07-26T09:34:24","date_gmt":"2023-07-26T09:34:24","guid":{"rendered":"https:\/\/statorials.org\/pt\/erro-padrao-de-regressao-do-excel\/"},"modified":"2023-07-26T09:34:24","modified_gmt":"2023-07-26T09:34:24","slug":"erro-padrao-de-regressao-do-excel","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/erro-padrao-de-regressao-do-excel\/","title":{"rendered":"Como calcular o erro padr\u00e3o de regress\u00e3o no excel"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Ajustamos um <a href=\"https:\/\/statorials.org\/pt\/regressao-linear-1\/\" target=\"_blank\" rel=\"noopener\">modelo de regress\u00e3o linear<\/a> , o modelo assume a seguinte forma:<\/span><\/p>\n<p> <span style=\"color: #000000;\">Y = \u03b2 <sub>0<\/sub> + \u03b2 <sub>1<\/sub> X + \u2026 + \u03b2 <sub>i<\/sub><\/span><\/p>\n<p> <span style=\"color: #000000;\">onde \u03f5 \u00e9 um termo de erro independente de X.<\/span><\/p>\n<p> <span style=\"color: #000000;\">N\u00e3o importa como X pode ser usado para prever os valores de Y, sempre haver\u00e1 erros aleat\u00f3rios no modelo.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Uma forma de medir a dispers\u00e3o desse erro aleat\u00f3rio \u00e9 utilizar o <strong>erro padr\u00e3o do modelo de regress\u00e3o<\/strong> , que \u00e9 uma forma de medir o desvio padr\u00e3o <a href=\"https:\/\/statorials.org\/pt\/residuo\/\" target=\"_blank\" rel=\"noopener\">dos res\u00edduos<\/a> \u03f5.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este tutorial fornece um exemplo passo a passo de como calcular o erro padr\u00e3o de um modelo de regress\u00e3o no Excel.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Etapa 1: crie os dados<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Para este exemplo, criaremos um conjunto de dados contendo as seguintes vari\u00e1veis para 12 alunos diferentes:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Resultado de exame<\/span><\/li>\n<li> <span style=\"color: #000000;\">Horas gastas estudando<\/span><\/li>\n<li> <span style=\"color: #000000;\">Turma atual<\/span> <\/li>\n<\/ul>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-14241 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/standregexcel1.png\" alt=\"\" width=\"504\" height=\"476\" srcset=\"\" sizes=\"auto, \"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Passo 2: Ajustar o modelo de regress\u00e3o<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">A seguir, ajustaremos um modelo <a href=\"https:\/\/statorials.org\/pt\/regressao-linear-multipla\/\" target=\"_blank\" rel=\"noopener\">de regress\u00e3o linear m\u00faltipla<\/a> usando a <em>nota do exame<\/em> como <a href=\"https:\/\/statorials.org\/pt\/respostas-explicativas-das-variaveis\/\" target=\"_blank\" rel=\"noopener\">vari\u00e1vel de resposta<\/a> e as <em>horas de estudo<\/em> e <em>a nota atual<\/em> como vari\u00e1veis preditoras.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Para fazer isso, clique na guia <strong>Dados<\/strong> na faixa superior e clique em <strong>An\u00e1lise de dados<\/strong> :<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-5292 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/deuxsampexcel3.png\" alt=\"\" width=\"472\" height=\"180\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Se esta op\u00e7\u00e3o n\u00e3o estiver dispon\u00edvel, voc\u00ea dever\u00e1 primeiro <a href=\"https:\/\/statorials.org\/pt\/como-carregar-o-pacote-de-ferramentas-de-analise-no-excel\/\" target=\"_blank\" rel=\"noopener\">carregar o Data Analysis ToolPak<\/a> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Na janela que aparece, selecione <strong>Regress\u00e3o<\/strong> . Na nova janela que aparece, forne\u00e7a as seguintes informa\u00e7\u00f5es:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-14242 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/standregexcel2.png\" alt=\"\" width=\"605\" height=\"457\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Depois de clicar em <strong>OK<\/strong> , a sa\u00edda do modelo de regress\u00e3o aparecer\u00e1:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-14243 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/standregexcel3.png\" alt=\"\" width=\"598\" height=\"449\" srcset=\"\" sizes=\"auto, \"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Etapa 3: Interpretar o erro padr\u00e3o de regress\u00e3o<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O erro padr\u00e3o do modelo de regress\u00e3o \u00e9 o n\u00famero pr\u00f3ximo ao <strong>erro padr\u00e3o<\/strong> :<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-14244 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/standregexcel4.png\" alt=\"Erro padr\u00e3o de regress\u00e3o no Excel\" width=\"604\" height=\"411\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">O erro padr\u00e3o deste modelo de regress\u00e3o espec\u00edfico \u00e9 <strong>2,790029<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este n\u00famero representa a dist\u00e2ncia m\u00e9dia entre os resultados reais do exame e os resultados do exame previstos pelo modelo.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe que alguns resultados de exames estar\u00e3o mais de 2,79 unidades distantes da pontua\u00e7\u00e3o prevista, enquanto outros estar\u00e3o mais pr\u00f3ximos. Mas, em m\u00e9dia, a dist\u00e2ncia entre os resultados reais dos exames e os resultados previstos \u00e9 <strong>2,790029<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe tamb\u00e9m que um erro padr\u00e3o de regress\u00e3o menor indica que um modelo de regress\u00e3o se ajusta melhor a um conjunto de dados.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Portanto, se ajustarmos um novo modelo de regress\u00e3o ao conjunto de dados e obtivermos um erro padr\u00e3o de, digamos, <strong>4,53<\/strong> , esse novo modelo seria menos eficaz na previs\u00e3o de notas em exames do que o modelo anterior.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Outra forma comum de medir a precis\u00e3o de um modelo de regress\u00e3o \u00e9 usar R-quadrado. Confira <a href=\"https:\/\/statorials.org\/pt\/regressao-de-erro-padrao\/\" target=\"_blank\" rel=\"noopener\">este artigo<\/a> para obter uma boa explica\u00e7\u00e3o sobre os benef\u00edcios de usar o erro padr\u00e3o de regress\u00e3o para medir a precis\u00e3o versus R-quadrado.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ajustamos um modelo de regress\u00e3o linear , o modelo assume a seguinte forma: Y = \u03b2 0 + \u03b2 1 X + \u2026 + \u03b2 i onde \u03f5 \u00e9 um termo de erro independente de X. N\u00e3o importa como X pode ser usado para prever os valores de Y, sempre haver\u00e1 erros aleat\u00f3rios no modelo. [&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-1439","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 o Erro Padr\u00e3o de Regress\u00e3o no Excel - Estatologia<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como calcular o erro padr\u00e3o de um modelo de regress\u00e3o 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\/erro-padrao-de-regressao-do-excel\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como Calcular o Erro Padr\u00e3o de Regress\u00e3o no Excel - Estatologia\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como calcular o erro padr\u00e3o de um modelo de regress\u00e3o no Excel, com um exemplo.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/erro-padrao-de-regressao-do-excel\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-26T09:34:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/standregexcel1.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\/erro-padrao-de-regressao-do-excel\/\",\"url\":\"https:\/\/statorials.org\/pt\/erro-padrao-de-regressao-do-excel\/\",\"name\":\"Como Calcular o Erro Padr\u00e3o de Regress\u00e3o no Excel - Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-26T09:34:24+00:00\",\"dateModified\":\"2023-07-26T09:34:24+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como calcular o erro padr\u00e3o de um modelo de regress\u00e3o no Excel, com um exemplo.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/erro-padrao-de-regressao-do-excel\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/erro-padrao-de-regressao-do-excel\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/erro-padrao-de-regressao-do-excel\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como calcular o erro padr\u00e3o de regress\u00e3o 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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