{"id":3068,"date":"2023-07-19T09:02:21","date_gmt":"2023-07-19T09:02:21","guid":{"rendered":"https:\/\/statorials.org\/pt\/encontrar-equacao-de-regressao-no-excel\/"},"modified":"2023-07-19T09:02:21","modified_gmt":"2023-07-19T09:02:21","slug":"encontrar-equacao-de-regressao-no-excel","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/encontrar-equacao-de-regressao-no-excel\/","title":{"rendered":"Como encontrar rapidamente uma equa\u00e7\u00e3o de regress\u00e3o no excel"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Voc\u00ea pode usar a fun\u00e7\u00e3o <strong>PROJ.LIN<\/strong> para encontrar rapidamente uma equa\u00e7\u00e3o de regress\u00e3o no Excel.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Esta fun\u00e7\u00e3o usa a seguinte sintaxe b\u00e1sica:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 17px;\"> <strong>LINEST(known_y's, known_x's)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Ouro:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>conhecidos_y&#8217;s<\/strong> : uma coluna de valores para a vari\u00e1vel de resposta<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>conhecidos_x\u2019s<\/strong> : uma ou mais colunas de valores para as vari\u00e1veis preditoras<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar esta fun\u00e7\u00e3o para encontrar uma equa\u00e7\u00e3o de regress\u00e3o para um <a href=\"https:\/\/statorials.org\/pt\/regressao-linear-1\/\" target=\"_blank\" rel=\"noopener\">modelo de regress\u00e3o linear simples<\/a> e um <a href=\"https:\/\/statorials.org\/pt\/regressao-linear-multipla\/\" target=\"_blank\" rel=\"noopener\">modelo de regress\u00e3o linear m\u00faltipla<\/a> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 1: Encontre a equa\u00e7\u00e3o para uma regress\u00e3o linear simples<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos o seguinte conjunto de dados que cont\u00e9m uma vari\u00e1vel preditora (x) e uma vari\u00e1vel de resposta (y):<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-26284 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/equation1.jpg\" alt=\"\" width=\"462\" height=\"433\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Podemos digitar a seguinte f\u00f3rmula na c\u00e9lula <strong>D1<\/strong> para calcular a equa\u00e7\u00e3o de regress\u00e3o linear simples para este conjunto de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 17px;\"> <strong>=LINEST( <span style=\"color: #3366ff;\">A2:A15<\/span> , <span style=\"color: #ff0000;\">B2:B15<\/span> )\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Ao pressionar <strong>ENTER<\/strong> , ser\u00e3o exibidos os coeficientes do modelo de regress\u00e3o linear simples:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-26286 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/equation2.jpg\" alt=\"\" width=\"489\" height=\"446\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Veja como interpretar o resultado:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O coeficiente da intercepta\u00e7\u00e3o \u00e9 <strong>3,115589<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">O coeficiente de inclina\u00e7\u00e3o \u00e9 <strong>0,479072<\/strong><\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Usando esses valores, podemos escrever a equa\u00e7\u00e3o para este modelo de regress\u00e3o simples:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>y = 3,115589 + 0,478072(x)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : Para encontrar valores p para coeficientes, valor r-quadrado do modelo e outras medidas, voc\u00ea deve usar a fun\u00e7\u00e3o de regress\u00e3o no Data Analysis ToolPak. Este <a href=\"https:\/\/statorials.org\/pt\/regressao-linear-simples-excel\/\" target=\"_blank\" rel=\"noopener\">tutorial<\/a> explica como fazer isso.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 2: Encontrando a equa\u00e7\u00e3o para regress\u00e3o linear m\u00faltipla<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos o seguinte conjunto de dados que cont\u00e9m duas vari\u00e1veis preditoras (x1 e x2) e uma vari\u00e1vel de resposta (y):<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-26287 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/equation3.jpg\" alt=\"\" width=\"456\" height=\"436\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Podemos digitar a seguinte f\u00f3rmula na c\u00e9lula <strong>E1<\/strong> para calcular a equa\u00e7\u00e3o de regress\u00e3o linear m\u00faltipla para este conjunto de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 17px;\"> <strong>=LINEST( <span style=\"color: #3366ff;\">A2:A15<\/span> , <span style=\"color: #ff0000;\">B2:C15<\/span> )\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Ao pressionar <strong>ENTER<\/strong> , os coeficientes do modelo de regress\u00e3o linear m\u00faltipla ser\u00e3o exibidos:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-26288 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/equation4.jpg\" alt=\"\" width=\"518\" height=\"448\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Veja como interpretar o resultado:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O coeficiente da intercepta\u00e7\u00e3o \u00e9 <strong>1,471205<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">O coeficiente para x1 \u00e9 <strong>0,047243<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">O coeficiente para x2 \u00e9 <strong>0,406344<\/strong><\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Usando esses valores, podemos escrever a equa\u00e7\u00e3o para este modelo de regress\u00e3o m\u00faltipla:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>y = 1,471205 + 0,047243(x1) + 0,406344(x2)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : Para encontrar valores p para coeficientes, valor r-quadrado do modelo e outras medidas para um modelo de regress\u00e3o linear m\u00faltipla no Excel, voc\u00ea deve usar a fun\u00e7\u00e3o Regress\u00e3o no Data Analysis ToolPak. Este<a href=\"https:\/\/statorials.org\/pt\/regressao-linear-multipla-excel\/\" target=\"_blank\" rel=\"noopener\">tutorial<\/a> explica como fazer isso.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir fornecem informa\u00e7\u00f5es adicionais sobre regress\u00e3o no Excel:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/interpretar-a-saida-da-regressao-no-excel\/\" target=\"_blank\" rel=\"noopener\">Como interpretar a sa\u00edda da regress\u00e3o no Excel<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/adicione-uma-linha-de-regressao-ao-grafico-de-dispersao-do-excel\/\" target=\"_blank\" rel=\"noopener\">Como adicionar uma linha de regress\u00e3o a um gr\u00e1fico de dispers\u00e3o no Excel<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/regressao-polinomial-excel\/\" target=\"_blank\" rel=\"noopener\">Como realizar regress\u00e3o polinomial no Excel<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar a fun\u00e7\u00e3o PROJ.LIN para encontrar rapidamente uma equa\u00e7\u00e3o de regress\u00e3o no Excel. Esta fun\u00e7\u00e3o usa a seguinte sintaxe b\u00e1sica: LINEST(known_y&#8217;s, known_x&#8217;s) Ouro: conhecidos_y&#8217;s : uma coluna de valores para a vari\u00e1vel de resposta conhecidos_x\u2019s : uma ou mais colunas de valores para as vari\u00e1veis preditoras Os exemplos a seguir mostram como usar [&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-3068","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 encontrar rapidamente uma equa\u00e7\u00e3o de regress\u00e3o no Excel \u2013 Estatologia<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como encontrar uma equa\u00e7\u00e3o de regress\u00e3o no Excel, com 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