{"id":876,"date":"2023-07-28T11:15:18","date_gmt":"2023-07-28T11:15:18","guid":{"rendered":"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/"},"modified":"2023-07-28T11:15:18","modified_gmt":"2023-07-28T11:15:18","slug":"autocorrelacao-do-excel","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/","title":{"rendered":"Como calcular a autocorrela\u00e7\u00e3o no excel"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>A autocorrela\u00e7\u00e3o<\/strong> mede o grau de similaridade entre uma s\u00e9rie temporal e uma vers\u00e3o defasada dela mesma em intervalos de tempo sucessivos.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\u00c0s vezes tamb\u00e9m \u00e9 chamada de \u201ccorrela\u00e7\u00e3o serial\u201d ou \u201ccorrela\u00e7\u00e3o defasada\u201d porque mede a rela\u00e7\u00e3o entre os valores atuais de uma vari\u00e1vel e seus valores hist\u00f3ricos.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Quando a autocorrela\u00e7\u00e3o em uma s\u00e9rie temporal \u00e9 alta, torna-se f\u00e1cil prever valores futuros simplesmente referindo-se a valores passados.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Autocorrela\u00e7\u00e3o no Excel<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">N\u00e3o existe uma fun\u00e7\u00e3o integrada para calcular a autocorrela\u00e7\u00e3o no Excel, mas podemos usar uma \u00fanica f\u00f3rmula para calcular a autocorrela\u00e7\u00e3o de uma s\u00e9rie temporal para um determinado valor de atraso.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Por exemplo, suponha que temos a seguinte s\u00e9rie temporal que mostra o valor de uma determinada vari\u00e1vel em 15 per\u00edodos de tempo diferentes:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9468 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/autocorrelationexcel1.png\" alt=\"Exemplo de s\u00e9rie temporal no Excel\" width=\"458\" height=\"501\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Podemos usar a seguinte f\u00f3rmula para calcular a autocorrela\u00e7\u00e3o no atraso k =2.<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 14px;\"> <strong>=(SUMPRODUCT( <span style=\"color: #3366ff;\">B2:B14<\/span> -AVERAGE( <span style=\"color: #ff6600;\">B2:B16<\/span> ), <span style=\"color: #993366;\">B4:B16<\/span> -AVERAGE( <span style=\"color: #ff6600;\">B2:B16<\/span> ))\/COUNT( <span style=\"color: #ff6600;\">B2:B16<\/span> ))\/VAR.P( <span style=\"color: #ff6600;\">B2:B16<\/span> )<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9469 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/autocorrelationexcel2.png\" alt=\"Calculando autocorrela\u00e7\u00e3o no Excel\" width=\"668\" height=\"268\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Isso d\u00e1 um valor de <strong>0,656325<\/strong> . Esta \u00e9 a autocorrela\u00e7\u00e3o no atraso k = 2.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos calcular a autocorrela\u00e7\u00e3o na defasagem k = 3 alterando o intervalo de valores na f\u00f3rmula:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 14px;\"> <strong>=(SUMPRODUCT( <span style=\"color: #3366ff;\">B2:B13<\/span> -AVERAGE( <span style=\"color: #ff6600;\">B2:B16<\/span> ), <span style=\"color: #993366;\">B5:B16<\/span> -AVERAGE( <span style=\"color: #ff6600;\">B2:B16<\/span> ))\/COUNT( <span style=\"color: #ff6600;\">B2:B16<\/span> ))\/VAR.P( <span style=\"color: #ff6600;\">B2:B16<\/span> )<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9474 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/autocorrelationexcel3-1.png\" alt=\"Fun\u00e7\u00e3o de autocorrela\u00e7\u00e3o para uma s\u00e9rie temporal no Excel\" width=\"668\" height=\"244\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Isso d\u00e1 um valor de <strong>0,49105<\/strong> . Esta \u00e9 a autocorrela\u00e7\u00e3o no atraso k = 3.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos encontrar a autocorrela\u00e7\u00e3o em cada defasagem usando uma f\u00f3rmula semelhante. Voc\u00ea notar\u00e1 que quanto maior o atraso, menor ser\u00e1 a autocorrela\u00e7\u00e3o. Isso \u00e9 t\u00edpico de um processo autoregressivo de s\u00e9rie temporal.<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9475 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/autocorrelationexcel4.png\" alt=\"Autocorrela\u00e7\u00e3o em diferentes defasagens no Excel\" width=\"536\" height=\"435\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><em>Voc\u00ea pode encontrar mais tutoriais de s\u00e9ries temporais do Excel <a href=\"https:\/\/statorials.org\/pt\/estatologia-explica-conceitos-de-forma-simples-e-direta-facilitamos-o-aprendizado-de-estatistica\/\" target=\"_blank\" rel=\"noopener\">nesta p\u00e1gina<\/a> .<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A autocorrela\u00e7\u00e3o mede o grau de similaridade entre uma s\u00e9rie temporal e uma vers\u00e3o defasada dela mesma em intervalos de tempo sucessivos. \u00c0s vezes tamb\u00e9m \u00e9 chamada de \u201ccorrela\u00e7\u00e3o serial\u201d ou \u201ccorrela\u00e7\u00e3o defasada\u201d porque mede a rela\u00e7\u00e3o entre os valores atuais de uma vari\u00e1vel e seus valores hist\u00f3ricos. Quando a autocorrela\u00e7\u00e3o em uma s\u00e9rie temporal [&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-876","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 autocorrela\u00e7\u00e3o no Excel - Estatologia<\/title>\n<meta name=\"description\" content=\"Uma explica\u00e7\u00e3o simples sobre como calcular a autocorrela\u00e7\u00e3o no Excel.\" \/>\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\/autocorrelacao-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 a autocorrela\u00e7\u00e3o no Excel - Estatologia\" \/>\n<meta property=\"og:description\" content=\"Uma explica\u00e7\u00e3o simples sobre como calcular a autocorrela\u00e7\u00e3o no Excel.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T11:15:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/autocorrelationexcel1.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=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/\",\"url\":\"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/\",\"name\":\"Como calcular a autocorrela\u00e7\u00e3o no Excel - Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-28T11:15:18+00:00\",\"dateModified\":\"2023-07-28T11:15:18+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Uma explica\u00e7\u00e3o simples sobre como calcular a autocorrela\u00e7\u00e3o no Excel.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/autocorrelacao-do-excel\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como calcular a autocorrela\u00e7\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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