{"id":593,"date":"2023-07-29T09:36:52","date_gmt":"2023-07-29T09:36:52","guid":{"rendered":"https:\/\/statorials.org\/pt\/cartao-excel\/"},"modified":"2023-07-29T09:36:52","modified_gmt":"2023-07-29T09:36:52","slug":"cartao-excel","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/cartao-excel\/","title":{"rendered":"Como calcular o erro percentual m\u00e9dio absoluto (mape) no excel"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Uma das m\u00e9tricas mais comumente usadas para medir a precis\u00e3o da previs\u00e3o de um modelo \u00e9 <strong>MAPE<\/strong> , que <strong>significa erro percentual m\u00e9dio absoluto<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">A f\u00f3rmula para calcular o MAPE \u00e9 a seguinte:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>MAPE<\/strong> = (1\/n) * \u03a3(|real \u2013 previs\u00e3o| \/ |real|) * 100<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ouro:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>\u03a3<\/strong> \u2013 um s\u00edmbolo sofisticado que significa \u201csoma\u201d<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>n<\/strong> \u2013 tamanho da amostra<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>real<\/strong> \u2013 o valor real dos dados<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>previs\u00e3o<\/strong> \u2013 o valor esperado dos dados<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">MAPE \u00e9 comumente usado porque \u00e9 f\u00e1cil de interpretar e explicar. Por exemplo, um valor MAPE de 11,5% significa que a diferen\u00e7a m\u00e9dia entre o valor previsto e o valor real \u00e9 de 11,5%.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Quanto menor o valor do MAPE, melhor o modelo \u00e9 capaz de prever os valores. Por exemplo, um modelo com MAPE de 2% \u00e9 mais preciso do que um modelo com MAPE de 10%.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Como calcular o MAPE no Excel<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Para calcular o MAPE no Excel, podemos realizar os seguintes passos:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Passo 1: Insira os valores reais e os valores previstos em duas colunas separadas.<\/strong><\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-5467 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mape1.png\" alt=\"Como calcular o MAPE no Excel\" width=\"431\" height=\"411\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Etapa 2: Calcule o erro percentual absoluto para cada linha.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Lembre-se de que o erro percentual absoluto \u00e9 calculado da seguinte forma: |previs\u00e3o real| \/ |real| * 100. Usaremos esta f\u00f3rmula para calcular a porcentagem de erro absoluto para cada linha.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A coluna D mostra a porcentagem de erro absoluto e a coluna E mostra a f\u00f3rmula que usamos:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-5469 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mape2-1.png\" alt=\"Exemplo de MAPE no Excel\" width=\"566\" height=\"370\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Repetiremos esta f\u00f3rmula para cada linha:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-5470 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mape3.png\" alt=\"MAPE em c\u00e1lculo Excel\" width=\"568\" height=\"310\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Etapa 3: Calcule o erro percentual absoluto m\u00e9dio.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Calcule o MAPE simplesmente encontrando a m\u00e9dia dos valores na coluna D:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-5472 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mape4.png\" alt=\"Exemplo de MAPE no Excel\" width=\"576\" height=\"362\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">O MAPE deste modelo acaba sendo de <strong>6,47%<\/strong> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Uma nota sobre o uso do MAPE<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Embora o MAPE seja simples de calcular e interpretar, existem algumas desvantagens potenciais no seu uso:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1.<\/strong> Como a f\u00f3rmula para calcular o erro percentual absoluto \u00e9 |previs\u00e3o-real| \/ |real| isso significa que n\u00e3o ser\u00e1 definido se algum dos valores reais for zero.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>2.<\/strong> O MAPE n\u00e3o deve ser usado com dados de baixo volume. Por exemplo, se a demanda real de um item for 2 e a previs\u00e3o for 1, o valor percentual absoluto do erro ser\u00e1 |2-1| \/ |2| = 50%, o que faz com que o erro de previs\u00e3o pare\u00e7a bastante alto, mesmo que a previs\u00e3o esteja errada apenas em 1 unidade.<\/span><\/p>\n<p> <em><span style=\"color: #000000;\">Outra forma comum de medir a precis\u00e3o da previs\u00e3o de um modelo \u00e9 o MAD \u2013 desvio m\u00e9dio absoluto. Aprenda como calcular MAD no Excel <a href=\"https:\/\/statorials.org\/pt\/como-calcular-facilmente-o-desvio-medio-absoluto-no-excel\/\" target=\"_blank\" rel=\"noopener\">aqui<\/a> .<\/span><\/em><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pt\" target=\"_blank\" rel=\"noopener\">O que \u00e9 considerado um bom valor para o MAPE?<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/smape-no-excel\/\" target=\"_blank\" rel=\"noopener\">Como calcular SMAPE no Excel<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/significa-erro-absoluto-do-excel\/\" target=\"_blank\" rel=\"noopener\">Como calcular MAE no Excel<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uma das m\u00e9tricas mais comumente usadas para medir a precis\u00e3o da previs\u00e3o de um modelo \u00e9 MAPE , que significa erro percentual m\u00e9dio absoluto . A f\u00f3rmula para calcular o MAPE \u00e9 a seguinte: MAPE = (1\/n) * \u03a3(|real \u2013 previs\u00e3o| \/ |real|) * 100 Ouro: \u03a3 \u2013 um s\u00edmbolo sofisticado que significa \u201csoma\u201d n [&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-593","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 percentual m\u00e9dio absoluto (MAPE) no Excel - Estatologia<\/title>\n<meta name=\"description\" content=\"Uma explica\u00e7\u00e3o simples sobre como calcular o erro percentual m\u00e9dio absoluto (MAPE) 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\/cartao-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 percentual m\u00e9dio absoluto (MAPE) no Excel - Estatologia\" \/>\n<meta property=\"og:description\" content=\"Uma explica\u00e7\u00e3o simples sobre como calcular o erro percentual m\u00e9dio absoluto (MAPE) no Excel.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/cartao-excel\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-29T09:36:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mape1.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\/cartao-excel\/\",\"url\":\"https:\/\/statorials.org\/pt\/cartao-excel\/\",\"name\":\"Como calcular o erro percentual m\u00e9dio absoluto (MAPE) no Excel - Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-29T09:36:52+00:00\",\"dateModified\":\"2023-07-29T09:36:52+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Uma explica\u00e7\u00e3o simples sobre como calcular o erro percentual m\u00e9dio absoluto (MAPE) no Excel.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/cartao-excel\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/cartao-excel\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/cartao-excel\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como calcular o erro percentual m\u00e9dio absoluto (mape) 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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