{"id":248,"date":"2023-08-03T15:17:12","date_gmt":"2023-08-03T15:17:12","guid":{"rendered":"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/"},"modified":"2023-08-03T15:17:12","modified_gmt":"2023-08-03T15:17:12","slug":"intervalo-de-confianca","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/","title":{"rendered":"Intervalo de confian\u00e7a"},"content":{"rendered":"<p>Este artigo explica o que \u00e9 um intervalo de confian\u00e7a nas estat\u00edsticas e para que ele \u00e9 usado. Voc\u00ea tamb\u00e9m encontrar\u00e1 os fatores que influenciam os intervalos de confian\u00e7a e como um intervalo de confian\u00e7a \u00e9 calculado. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%c2%bfque-es-un-intervalo-de-confianza\"><\/span> O que \u00e9 um intervalo de confian\u00e7a?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Nas estat\u00edsticas, o <strong>intervalo de confian\u00e7a<\/strong> \u00e9 um intervalo que d\u00e1 uma aproxima\u00e7\u00e3o dos valores entre os quais o valor de um par\u00e2metro populacional se vincula a um determinado n\u00edvel de confian\u00e7a. Os intervalos de confian\u00e7a mais comuns t\u00eam um n\u00edvel de confian\u00e7a de 95% ou 99%.<\/p>\n<p> Por exemplo, se o intervalo de confian\u00e7a da m\u00e9dia de uma popula\u00e7\u00e3o com n\u00edvel de confian\u00e7a de 95% for (3,7), isso significa que a m\u00e9dia da popula\u00e7\u00e3o estudada estar\u00e1 entre 3 e 7 com probabilidade de 95%.<\/p>\n<p> Portanto, o intervalo de confian\u00e7a \u00e9 usado para estimar dois valores entre os quais se encontra um par\u00e2metro populacional. Geralmente, os valores dos par\u00e2metros populacionais s\u00e3o desconhecidos, portanto, um intervalo de confian\u00e7a \u00e9 calculado a partir dos dados de uma amostra para se ter uma estimativa dos par\u00e2metros populacionais. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"factores-que-influyen-en-el-intervalo-de-confianza\"><\/span> Fatores que influenciam o intervalo de confian\u00e7a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Depois de vermos a defini\u00e7\u00e3o do intervalo de confian\u00e7a, veremos quais s\u00e3o os fatores dos quais dependem os intervalos de confian\u00e7a para melhor compreender o conceito.<\/p>\n<ul style=\"color:#FF8A05; font-weight: bold;\">\n<li style=\"margin-bottom:22px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Tamanho da amostra<\/strong> : o n\u00famero de observa\u00e7\u00f5es estudadas influencia na precis\u00e3o do intervalo de confian\u00e7a, pois quanto mais dados tivermos, mais um valor poder\u00e1 ser estimado. Em geral, quanto maior o tamanho da amostra, menor ser\u00e1 a largura do intervalo de confian\u00e7a.<\/span><\/li>\n<li style=\"margin-bottom:22px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Margem de erro<\/strong> : quanto maior o erro permitido, maior o intervalo de confian\u00e7a e, portanto, maior a probabilidade de o valor verdadeiro do par\u00e2metro estar dentro do intervalo de confian\u00e7a. Contudo, a margem de erro diminui a precis\u00e3o do intervalo de confian\u00e7a.<\/span><\/li>\n<li style=\"margin-bottom:22px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>N\u00edvel de confian\u00e7a<\/strong> : \u00e9 a probabilidade de que a estimativa da estat\u00edstica populacional esteja dentro do intervalo de confian\u00e7a. Normalmente, o n\u00edvel de confian\u00e7a de um intervalo \u00e9 indicado como 1-\u03b1 e expresso como uma porcentagem. Um alto n\u00edvel de confian\u00e7a aumenta a probabilidade de que o valor verdadeiro esteja entre os limites do intervalo, mas tamb\u00e9m aumenta a largura do intervalo.<\/span><\/li>\n<li style=\"margin-bottom:22px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>O par\u00e2metro estimado<\/strong> : o intervalo de confian\u00e7a depende do par\u00e2metro a ser aproximado. Na verdade, a f\u00f3rmula a utilizar para calcular o intervalo de confian\u00e7a depende do par\u00e2metro aproximado.<\/span> <\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"como-calcular-el-intervalo-de-confianza\"><\/span> Como calcular o intervalo de confian\u00e7a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> A f\u00f3rmula a aplicar para calcular cada tipo de intervalo de confian\u00e7a \u00e9 apresentada a seguir, pois dependendo se queremos determinar o intervalo de confian\u00e7a para a m\u00e9dia, vari\u00e2ncia ou propor\u00e7\u00e3o, a f\u00f3rmula a utilizar \u00e9 diferente. <\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"intervalo-de-confianza-para-la-media\"><\/span> Intervalo de confian\u00e7a para a m\u00e9dia<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> Partindo do fato de que o processo de digita\u00e7\u00e3o de uma vari\u00e1vel \u00e9 feito da seguinte forma:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-f93a5e76c38b2e2556bd62ba66db5947_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z=\\cfrac{X-\\mu}{\\displaystyle\\frac{\\sigma}{\\sqrt{n}}} \\sim N(0,1)\" title=\"Rendered by QuickLaTeX.com\" height=\"60\" width=\"165\" style=\"vertical-align: -34px;\"><\/p>\n<\/p>\n<p> O intervalo de confian\u00e7a da m\u00e9dia \u00e9 calculado somando e subtraindo da m\u00e9dia amostral o valor de Z <sub>\u03b1\/2<\/sub> multiplicado pelo desvio padr\u00e3o (\u03c3) e dividido pela raiz quadrada do tamanho da amostra (n). Portanto, a f\u00f3rmula para calcular o intervalo de confian\u00e7a da m\u00e9dia \u00e9:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-985a374c69b468deb3d6d159fcbe6de5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left(\\overline{x}-z_{\\alpha\/2}\\cdot \\frac{\\sigma}{\\sqrt{n}} \\ , \\ \\overline{x}+z_{\\alpha\/2}\\cdot \\frac{\\sigma}{\\sqrt{n}} \\right)\" title=\"Rendered by QuickLaTeX.com\" height=\"43\" width=\"251\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p> Para amostras grandes e n\u00edvel de confian\u00e7a de 95%, o valor cr\u00edtico \u00e9 Z <sub>\u03b1\/2<\/sub> = 1,96 e para n\u00edvel de confian\u00e7a de 99%, o valor cr\u00edtico \u00e9 Z <sub>\u03b1\/2<\/sub> = 2,576.<\/p>\n<p> A f\u00f3rmula acima \u00e9 usada quando a vari\u00e2ncia populacional \u00e9 conhecida. Por\u00e9m, se a vari\u00e2ncia populacional for desconhecida, que \u00e9 o caso mais comum, <strong>o intervalo de confian\u00e7a para a m\u00e9dia \u00e9 calculado utilizando a seguinte f\u00f3rmula:<\/strong><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-e40e2c40fbfe4f5aa96c21ff979aae5a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left(\\overline{x}-t_{\\alpha\/2}\\cdot \\frac{s}{\\sqrt{n}} \\ , \\ \\overline{x}+t_{\\alpha\/2}\\cdot \\frac{s}{\\sqrt{n}} \\right)\" title=\"Rendered by QuickLaTeX.com\" height=\"43\" width=\"247\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro:<\/p>\n<ul style=\"color:#FF8A05; font-weight: bold;\">\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-a39858a792fb4fe9a3173e004701f2a7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\overline{x}\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a m\u00e9dia amostral.<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-33bd5d525ddf37600aef97b0c8c08f94_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"t_{\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"29\" style=\"vertical-align: -8px;\"><\/p>\n<p> \u00e9 o valor da distribui\u00e7\u00e3o t de Student de n-1 graus de liberdade com probabilidade \u03b1\/2.<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-1edc883862ceed1a21913f60358e31d8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"s\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"8\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o desvio padr\u00e3o da amostra.<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o tamanho da amostra. <\/li>\n<\/ul>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/intervalle-de-confiance.png\" alt=\"intervalo de confian\u00e7a\" class=\"wp-image-5249\" width=\"351\" height=\"339\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<div style=\"background-color:#FFFDE7; padding-top: 10px; padding-bottom: 10px; padding-right: 20px; padding-left: 30px; border: 2.5px dashed #FFB74D; border-radius:20px;\"> <span style=\"color:#ff951b\">\u27a4<\/span> <strong>Veja:<\/strong> <a href=\"https:\/\/statorials.org\/pt\/intervalo-de-confianca-para-a-media\/\">Exemplo de c\u00e1lculo do intervalo de confian\u00e7a da m\u00e9dia<\/a> <\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"intervalo-de-confianza-para-la-varianza\"><\/span> Intervalo de confian\u00e7a para vari\u00e2ncia<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> Para calcular o intervalo de confian\u00e7a para a vari\u00e2ncia de uma popula\u00e7\u00e3o, \u00e9 utilizada a distribui\u00e7\u00e3o qui-quadrado. Mais especificamente, a <strong>f\u00f3rmula para calcular o intervalo de confian\u00e7a da vari\u00e2ncia<\/strong> \u00e9:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-c81b971afee9691573e8400dc0945c37_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left( (n-1)\\frac{s^2}{\\chi_{n-1;\\alpha\/2}} \\ , \\ (n-1)\\frac{s^2}{\\chi_{n-1;1-\\alpha\/2}}\\right)\" title=\"Rendered by QuickLaTeX.com\" height=\"47\" width=\"304\" style=\"vertical-align: -20px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro:<\/p>\n<ul style=\"color:#FF8A05; font-weight: bold;\">\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o tamanho da amostra.<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-1edc883862ceed1a21913f60358e31d8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"s\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"8\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o desvio padr\u00e3o da amostra.<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-a1f2f5b5bd065f40d0b8c175d6d48950_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\chi_{n-1;\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"64\" style=\"vertical-align: -8px;\"><\/p>\n<p> \u00e9 o valor da distribui\u00e7\u00e3o qui-quadrado com n-1 graus de liberdade para uma probabilidade menor que \u03b1\/2.<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-f1726e9973441084f7ac98c5550f1b23_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\chi_{n-1;1-\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"82\" style=\"vertical-align: -8px;\"><\/p>\n<p> \u00e9 o valor da distribui\u00e7\u00e3o Qui-quadrado com n-1 graus de liberdade para uma probabilidade superior a 1-\u03b1\/2. <\/li>\n<\/ul>\n<div style=\"background-color:#FFFDE7; padding-top: 10px; padding-bottom: 10px; padding-right: 20px; padding-left: 30px; border: 2.5px dashed #FFB74D; border-radius:20px;\"> <span style=\"color:#ff951b\">\u27a4<\/span> <strong>Veja:<\/strong> <a href=\"https:\/\/statorials.org\/pt\/intervalo-de-confianca-para-variancia\/\">Exemplo de c\u00e1lculo do intervalo de confian\u00e7a para a vari\u00e2ncia<\/a> <\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"intervalo-de-confianza-para-la-proporcion\"><\/span> Intervalo de confian\u00e7a para propor\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p> O intervalo de confian\u00e7a para a propor\u00e7\u00e3o \u00e9 calculado somando e subtraindo da propor\u00e7\u00e3o amostral o valor de Z <sub>\u03b1\/2<\/sub> multiplicado pela raiz quadrada da propor\u00e7\u00e3o amostral (p) multiplicado por 1-p e dividido pelo tamanho da amostra (n). Portanto, a <strong>f\u00f3rmula para calcular o intervalo de confian\u00e7a da propor\u00e7\u00e3o<\/strong> \u00e9:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-a328986eaa330c075c7fb85780df6411_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\left(p-Z_{\\alpha\/2}\\sqrt{\\frac{p(1-p)}{n}}\\ , \\ p+Z_{\\alpha\/2}\\sqrt{\\frac{p(1-p)}{n}}\\right) \" title=\"Rendered by QuickLaTeX.com\" height=\"54\" width=\"339\" style=\"vertical-align: -23px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#FF8A05; font-weight: bold;\">\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-5faad0904f612a3fa5b27faafb8dc903_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"p\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"10\" style=\"vertical-align: -4px;\"><\/p>\n<p> \u00e9 a propor\u00e7\u00e3o da amostra.<\/li>\n<li style=\"margin-bottom:5px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o tamanho da amostra.<\/li>\n<li style=\"margin-bottom:7px\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-6f8ee37ecf97c2a7c7d6dbe8fddddc27_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Z_{\\alpha\/2}\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"34\" style=\"vertical-align: -8px;\"><\/p>\n<p> \u00e9 o quantil da distribui\u00e7\u00e3o normal padr\u00e3o correspondente a uma probabilidade de \u03b1\/2. Para amostras grandes e n\u00edvel de confian\u00e7a de 95% \u00e9 geralmente pr\u00f3ximo de 1,96 e para n\u00edvel de confian\u00e7a de 99% \u00e9 geralmente pr\u00f3ximo de 2,576. <\/li>\n<\/ul>\n<div style=\"background-color:#FFFDE7; padding-top: 10px; padding-bottom: 10px; padding-right: 20px; padding-left: 30px; border: 2.5px dashed #FFB74D; border-radius:20px;\"> <span style=\"color:#ff951b\">\u27a4<\/span> <strong>Veja:<\/strong> <a href=\"https:\/\/statorials.org\/pt\/intervalo-de-confianca-para-proporcao\/\">Exemplo de c\u00e1lculo do intervalo de confian\u00e7a para a propor\u00e7\u00e3o<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Este artigo explica o que \u00e9 um intervalo de confian\u00e7a nas estat\u00edsticas e para que ele \u00e9 usado. Voc\u00ea tamb\u00e9m encontrar\u00e1 os fatores que influenciam os intervalos de confian\u00e7a e como um intervalo de confian\u00e7a \u00e9 calculado. O que \u00e9 um intervalo de confian\u00e7a? Nas estat\u00edsticas, o intervalo de confian\u00e7a \u00e9 um intervalo que d\u00e1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-248","post","type-post","status-publish","format-standard","hentry","category-estatisticas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u25b7 Intervalo de confian\u00e7a<\/title>\n<meta name=\"description\" content=\"Aqui voc\u00ea descobrir\u00e1 o que \u00e9 um intervalo de confian\u00e7a nas estat\u00edsticas, como um intervalo de confian\u00e7a \u00e9 calculado (f\u00f3rmula) e exemplos concretos.\" \/>\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\/intervalo-de-confianca\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u25b7 Intervalo de confian\u00e7a\" \/>\n<meta property=\"og:description\" content=\"Aqui voc\u00ea descobrir\u00e1 o que \u00e9 um intervalo de confian\u00e7a nas estat\u00edsticas, como um intervalo de confian\u00e7a \u00e9 calculado (f\u00f3rmula) e exemplos concretos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-08-03T15:17:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-f93a5e76c38b2e2556bd62ba66db5947_l3.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=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/\",\"url\":\"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/\",\"name\":\"\u25b7 Intervalo de confian\u00e7a\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-08-03T15:17:12+00:00\",\"dateModified\":\"2023-08-03T15:17:12+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Aqui voc\u00ea descobrir\u00e1 o que \u00e9 um intervalo de confian\u00e7a nas estat\u00edsticas, como um intervalo de confian\u00e7a \u00e9 calculado (f\u00f3rmula) e exemplos concretos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/intervalo-de-confianca\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Intervalo de confian\u00e7a\"}]},{\"@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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