{"id":4571,"date":"2023-07-10T00:44:39","date_gmt":"2023-07-10T00:44:39","guid":{"rendered":"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/"},"modified":"2023-07-10T00:44:39","modified_gmt":"2023-07-10T00:44:39","slug":"assimetria-curtose-em-sas","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/","title":{"rendered":"Como calcular assimetria e curtose no sas"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Nas estat\u00edsticas, <strong>a assimetria<\/strong> e <strong>a curtose<\/strong> s\u00e3o duas maneiras de medir a forma de uma distribui\u00e7\u00e3o.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A <strong>assimetria<\/strong> mede a assimetria de uma distribui\u00e7\u00e3o.<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">A assimetria negativa indica que a cauda est\u00e1 no lado esquerdo da distribui\u00e7\u00e3o.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Uma inclina\u00e7\u00e3o positiva indica que a cauda est\u00e1 no lado direito da distribui\u00e7\u00e3o.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Um valor zero indica que n\u00e3o h\u00e1 assimetria na distribui\u00e7\u00e3o, o que significa que a distribui\u00e7\u00e3o \u00e9 perfeitamente sim\u00e9trica.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>A curtose<\/strong> mede se uma distribui\u00e7\u00e3o tem cauda pesada ou leve em compara\u00e7\u00e3o com uma <a href=\"https:\/\/statorials.org\/pt\/a-distribuicao-normal\/\" target=\"_blank\" rel=\"noopener noreferrer\">distribui\u00e7\u00e3o normal<\/a> .<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">A curtose de uma distribui\u00e7\u00e3o normal \u00e9 0.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Se uma determinada distribui\u00e7\u00e3o tiver uma curtose menor que 0, ela \u00e9 considerada <em>playkurtica<\/em> , o que significa que tende a produzir menos valores discrepantes e menos extremos do que a distribui\u00e7\u00e3o normal.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Se uma determinada distribui\u00e7\u00e3o tiver curtose superior a 0, diz-se que \u00e9 <em>leptoc\u00fartica<\/em> , o que significa que tende a produzir mais valores discrepantes do que a distribui\u00e7\u00e3o normal.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Para calcular assimetria e curtose de vari\u00e1veis no SAS, voc\u00ea pode usar as instru\u00e7\u00f5es <strong>SKEWNESS<\/strong> e <strong>KURTOSIS<\/strong> em <strong>PROC MEANS<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">O exemplo a seguir mostra como usar essas instru\u00e7\u00f5es na pr\u00e1tica.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo: Calculando assimetria e curtose no SAS<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Suponha que temos o seguinte conjunto de dados no SAS que cont\u00e9m informa\u00e7\u00f5es sobre v\u00e1rios jogadores de basquete:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">\/*create dataset*\/\n<\/span><span style=\"color: #800080;\">data<\/span> my_data;\n    <span style=\"color: #3366ff;\">input<\/span> team $points assists;\n    <span style=\"color: #3366ff;\">datalines<\/span> ;\nAt 10 2\nAt 17 5\nAt 17 6\nAt 18 3\nAt 15 0\nB 10 2\nB 14 5\nB 13 4\nB 29 0\nB 25 2\nC 12 1\nC 30 1\nC 34 3\nC 12 4\nC 11 7\n;\n<span style=\"color: #800080;\">run<\/span> ;\n\n<span style=\"color: #008000;\">\/*view dataset*\/\n<\/span><span style=\"color: #800080;\">proc print<\/span> <span style=\"color: #3366ff;\">data<\/span> =my_data;<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-33383 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/desc1.jpg\" alt=\"\" width=\"212\" height=\"405\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Podemos usar <strong>PROC MEANS<\/strong> com as instru\u00e7\u00f5es <strong>SKEWNESS<\/strong> e <strong>KURTOSIS<\/strong> para calcular a assimetria e a curtose de cada vari\u00e1vel num\u00e9rica no conjunto de dados:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">\/*calculate skewness and kurtosis for each numeric variable*\/\n<\/span><span style=\"color: #800080;\">proc means<\/span> <span style=\"color: #3366ff;\">data<\/span> =my_data <span style=\"color: #3366ff;\">SKEWNESS<\/span> <span style=\"color: #3366ff;\">KURTOSIS<\/span> ;\n<span style=\"color: #800080;\">run<\/span> ;<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-35684 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/sk1.png\" alt=\"\" width=\"261\" height=\"118\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">A tabela de sa\u00edda exibe os valores de assimetria e curtose para cada vari\u00e1vel num\u00e9rica no conjunto de dados:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>(1) pontos<\/strong><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">A vari\u00e1vel points tem uma <strong>assimetria<\/strong> de <strong>1,009<\/strong> . Como esse valor \u00e9 maior que 0, significa que a cauda est\u00e1 do lado direito da distribui\u00e7\u00e3o.<\/span><\/li>\n<li> <span style=\"color: #000000;\">A vari\u00e1vel points tem uma <strong>curtose<\/strong> de <strong>-0,299<\/strong> . Como esse valor \u00e9 menor que 0, significa que a distribui\u00e7\u00e3o tem um pouco menos valores discrepantes e menos valores extremos do que a distribui\u00e7\u00e3o normal.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>(2) ajuda<\/strong><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">A vari\u00e1vel assist\u00eancias tem uma <strong>assimetria<\/strong> de <strong>0,304<\/strong> . Como esse valor \u00e9 maior que 0, significa que a cauda est\u00e1 do lado direito da distribui\u00e7\u00e3o.<\/span><\/li>\n<li> <span style=\"color: #000000;\">A vari\u00e1vel suporte apresenta <strong>curtose<\/strong> de <strong>-0,782<\/strong> . Como esse valor \u00e9 menor que 0, significa que a distribui\u00e7\u00e3o tem menos valores discrepantes e menos valores extremos do que a distribui\u00e7\u00e3o normal.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Para visualizar a distribui\u00e7\u00e3o de valores para cada vari\u00e1vel num\u00e9rica no conjunto de dados, voc\u00ea pode usar <strong>PROC UNIVARIATE<\/strong> para criar histogramas para as vari\u00e1veis de ponto e assist\u00eancia:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">\/*create histograms for points and assists variables*\/\n<\/span><span style=\"color: #800080;\">proc univariate<\/span> <span style=\"color: #3366ff;\">data<\/span> =my_data;\n    <span style=\"color: #3366ff;\">var<\/span> points assists;\n    <span style=\"color: #3366ff;\">histogram<\/span> points assists;\n<span style=\"color: #800080;\">run<\/span> ;<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Isso produz o seguinte histograma para a vari\u00e1vel <strong>points<\/strong> :<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-35685 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/histo1.png\" alt=\"\" width=\"601\" height=\"451\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">E o seguinte histograma para a vari\u00e1vel <b>assistencial<\/b> :<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-35686 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/histo2.png\" alt=\"\" width=\"593\" height=\"447\" srcset=\"\" sizes=\"auto, \"><\/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 executar outras tarefas comuns no SAS:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/estatistica-descritiva-em-sas\/\" target=\"_blank\" rel=\"noopener\">Como calcular estat\u00edsticas descritivas no SAS<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/tabela-de-frequencia-sas\/\" target=\"_blank\" rel=\"noopener\">Como criar tabelas de frequ\u00eancia no SAS<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/percentis-sas\/\" target=\"_blank\" rel=\"noopener\">Como calcular percentis no SAS<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/tabela-dinamica-sas\/\" target=\"_blank\" rel=\"noopener\">Como criar tabelas din\u00e2micas no SAS<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nas estat\u00edsticas, a assimetria e a curtose s\u00e3o duas maneiras de medir a forma de uma distribui\u00e7\u00e3o. A assimetria mede a assimetria de uma distribui\u00e7\u00e3o. A assimetria negativa indica que a cauda est\u00e1 no lado esquerdo da distribui\u00e7\u00e3o. Uma inclina\u00e7\u00e3o positiva indica que a cauda est\u00e1 no lado direito da distribui\u00e7\u00e3o. Um valor zero indica [&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-4571","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 assimetria e curtose no SAS - Estatologia<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como calcular assimetria e curtose de vari\u00e1veis no SAS, 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\/assimetria-curtose-em-sas\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como calcular assimetria e curtose no SAS - Estatologia\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como calcular assimetria e curtose de vari\u00e1veis no SAS, com um exemplo.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-10T00:44:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/desc1.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=\"3 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/\",\"url\":\"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/\",\"name\":\"Como calcular assimetria e curtose no SAS - Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-10T00:44:39+00:00\",\"dateModified\":\"2023-07-10T00:44:39+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como calcular assimetria e curtose de vari\u00e1veis no SAS, com um exemplo.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/assimetria-curtose-em-sas\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como calcular assimetria e curtose no sas\"}]},{\"@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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