

{"id":68395,"date":"2019-03-18T05:00:38","date_gmt":"2019-03-18T12:00:38","guid":{"rendered":"https:\/\/www.questionpro.com\/blog\/?p=68395"},"modified":"2025-04-03T08:43:21","modified_gmt":"2025-04-03T15:43:21","slug":"testes-parametricos","status":"publish","type":"post","link":"https:\/\/www.questionpro.com\/blog\/pt-br\/testes-parametricos\/","title":{"rendered":"O que s\u00e3o testes param\u00e9tricos?"},"content":{"rendered":"\n<p><span style=\"font-weight: 400;\">Testes param\u00e9tricos s\u00e3o uma ferramenta estat\u00edstica usada para a an\u00e1lise de fatores populacionais. Essa amostra deve atender a determinados requisitos, como tamanho, pois quanto maior seja o tamanho da amostra, mais preciso ser\u00e1 o c\u00e1lculo.<\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\">Este m\u00e9todo requer a especifica\u00e7\u00e3o da forma de distribui\u00e7\u00e3o da popula\u00e7\u00e3o materna estudada. Pode ser, por exemplo, uma distribui\u00e7\u00e3o normal, como \u00e9 geralmente quando se trata de amostras grandes. Em geral, esses testes s\u00f3 podem ser aplicados a vari\u00e1veis \u200b\u200bnum\u00e9ricas.&nbsp;<\/span><a href=\"https:\/\/www.questionpro.com\/blog\/pt-br\/pensamento-futuro\/\"><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\"><br><\/span><\/a><span style=\"font-weight: 400;\">Os testes param\u00e9tricos baseiam-se na lei de distribui\u00e7\u00e3o da vari\u00e1vel em estudo. Embora existam muitos tipos de leis de distribui\u00e7\u00e3o, estas s\u00e3o baseadas nas normais, possuindo dois par\u00e2metros: a m\u00e9dia e o desvio padr\u00e3o; o suficiente para saber a probabilidade.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Condi\u00e7\u00f5es que os testes param\u00e9tricos devem atender<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">Um teste param\u00e9trico deve obedecer aos seguintes elementos:<\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\">Normalidade: A an\u00e1lise e observa\u00e7\u00f5es obtidas das amostras devem ser consideradas normais. Para isso, testes de adequa\u00e7\u00e3o devem ser realizados, descrevendo qu\u00e3o adaptadas s\u00e3o as observa\u00e7\u00f5es e como elas diferem dos valores esperados. <\/span><\/p>\n\n\n\n<p><a href=\"https:\/\/www.questionpro.com\/blog\/pt-br\/teste-de-mercado\/\" target=\"_blank\" rel=\"bookmark noopener noreferrer\">Teste de mercado: realize antes de lan\u00e7ar um produto<\/a><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Uniformidade: Os grupos devem apresentar vari\u00e1veis \u200b\u200buniformes, isto \u00e9, devem ser homog\u00eaneos.<\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\">Erros: Os erros que surgem devem ser independentes. Isso s\u00f3 acontece quando os sujeitos s\u00e3o distribu\u00eddos aleatoriamente dentro do grupo.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Leia tamb\u00e9m: <\/span><a href=\"https:\/\/www.questionpro.com\/blog\/pt-br\/pesquisa-social\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400;\">O que \u00e9 pesquisa social?<\/span><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Tipos de testes param\u00e9tricos:<\/span><\/h2>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">Prova do valor Z da distribui\u00e7\u00e3o normal.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Teste T de Student para dados relacionados (amostras dependentes).<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">T de Student para dados n\u00e3o relacionados (amostras independentes).<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Teste T de Student-Welch para duas amostras independentes com vari\u00e2ncias n\u00e3o homog\u00eaneas.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Teste de Chi Square de Bartlett para demonstrar a homogeneidade das varia\u00e7\u00f5es.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">F (an\u00e1lise de vari\u00e2ncia ou ANOVA).<\/span><\/li>\n<\/ul>\n\n\n\n<p><span style=\"font-weight: 400;\">Saiba tamb\u00e9m: <\/span><a href=\"https:\/\/www.questionpro.com\/blog\/pt-br\/coleta-de-dados-qualitativos\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400;\">M\u00e9todos de coleta de dados qualitativos<\/span><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Vantagens e desvantagens&nbsp;<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">Algumas das vantagens dos testes param\u00e9tricos s\u00e3o:<\/span><\/p>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">S\u00e3o mais eficientes.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Percept\u00edveis \u00e0s caracter\u00edsticas da informa\u00e7\u00e3o obtida.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Os erros s\u00e3o muito improv\u00e1veis.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Os c\u00e1lculos probabil\u00edsticos s\u00e3o muito precisos.<\/span><\/li>\n<\/ul>\n\n\n\n<p><a href=\"https:\/\/www.questionpro.com\/blog\/pt-br\/caracteristicas-da-pesquisa\/\" target=\"_blank\" rel=\"bookmark noopener noreferrer\">Conhe\u00e7a as caracter\u00edsticas da pesquisa de campo<\/a><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">As desvantagens dos testes param\u00e9tricos s\u00e3o:<\/span><\/p>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">Os c\u00e1lculos s\u00e3o dif\u00edceis de executar.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Os dados que podem ser observados s\u00e3o limitados.<\/span><\/li>\n<\/ul>\n\n\n\n<p><a href=\"https:\/\/www.questionpro.com\/blog\/pt-br\/tecnicas-qualitativas\/\" target=\"_blank\" rel=\"bookmark noopener noreferrer\">T\u00e9cnicas qualitativas de pesquisa de mercado \u2013 conhe\u00e7a agora!<\/a><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Testes param\u00e9tricos s\u00e3o uma ferramenta \u00fatil para m\u00faltiplas situa\u00e7\u00f5es, c\u00e1lculos e interpreta\u00e7\u00f5es. <\/span><span style=\"font-weight: 400;\">Por serem comumente utilizados, \u00e9 poss\u00edvel observar os resultados obtidos atrav\u00e9s de uma an\u00e1lise.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">S\u00e3o um m\u00e9todo muito poderoso se as condi\u00e7\u00f5es da sua aplica\u00e7\u00e3o forem atendidas. No entanto, os pesquisadores devem ter em mente que, se as vari\u00e1veis \u200b\u200bque est\u00e3o estudando n\u00e3o seguem uma lei normal, n\u00e3o podem ser escolhidas.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Tamb\u00e9m recomendamos: <\/span><a href=\"https:\/\/www.questionpro.com\/blog\/pt-br\/analise-conjunta\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400;\">Vantagens da an\u00e1lise conjunta<\/span><\/a><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Para agilizar seu processo de trabalho e para que tenha recursos que enriquecem seu projeto de pesquisa, utilize uma plataforma online de pesquisa, te convido a conhecer a<\/span><a href=\"https:\/\/www.questionpro.com\/pt-br\/\"><span style=\"font-weight: 400;\"> Questionpro<\/span><\/a><span style=\"font-weight: 400;\">, uma solu\u00e7\u00e3o completa em pesquisa e intelig\u00eancia de mercado.&nbsp;<\/span><\/p>\n\n\n\n<center>\n<a href=\"https:\/\/contactar.questionpro.com\/signup-brazil?custom1=testeparametro\">\n<button style=\"background: #ff9f00;\">Criar conta gr\u00e1tis<\/button>\n<\/a>\n<a href=\"https:\/\/www.questionpro.com\/pt-br\/tour\/#ancora-formulario\">\n<button>Agendar demonstra\u00e7\u00e3o<\/button>\n<\/a>\n<\/center>\n\n\n\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/EPKW5TZxSIk\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Siga-nos nas redes sociais e receba sempre dicas e novidades:<\/span><a href=\"https:\/\/www.facebook.com\/QuestionPro.Pesquisas.Online\/\"><span style=\"font-weight: 400;\"> Facebook<\/span><\/a><span style=\"font-weight: 400;\">,<\/span><a href=\"https:\/\/twitter.com\/QuestionProBr\"><span style=\"font-weight: 400;\"> Twitter<\/span><\/a><span style=\"font-weight: 400;\">,<\/span><a href=\"https:\/\/www.linkedin.com\/company\/questionpro-br\/\"><span style=\"font-weight: 400;\"> Linkedin<\/span><\/a><span style=\"font-weight: 400;\">,<\/span><a href=\"https:\/\/www.instagram.com\/questionprobr\"> <span style=\"font-weight: 400;\">Instagram<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n\n\n\n<center>\n<a href=\"https:\/\/contactar.questionpro.com\/signup-brazil?custom1=testes-parametricos\">\n<button style=\"background: #ff9f00;\">Criar conta gr\u00e1tis<\/button>\n<\/a>\n<a href=\"https:\/\/www.questionpro.com\/pt-br\/tour\/#ancora-formulario\">\n<button>Agendar demonstra\u00e7\u00e3o<\/button>\n<\/a>\n<\/center>\n","protected":false},"excerpt":{"rendered":"<p>Testes param\u00e9tricos s\u00e3o uma ferramenta estat\u00edstica usada para a an\u00e1lise de fatores populacionais. Essa amostra deve atender a determinados requisitos, [&hellip;]<\/p>\n","protected":false},"author":97,"featured_media":68396,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[243,217],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Testes param\u00e9tricos: conhe\u00e7a essa ferramenta estat\u00edstica<\/title>\n<meta name=\"description\" content=\"Testes param\u00e9tricos s\u00e3o uma ferramenta estat\u00edstica usada para a an\u00e1lise de fatores populacionais. 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