{"id":11160,"date":"2025-07-15T13:34:51","date_gmt":"2025-07-15T13:34:51","guid":{"rendered":"https:\/\/functiontranslator.com\/inv-t-2c\/"},"modified":"2021-02-25T17:31:34","modified_gmt":"2021-02-25T17:31:34","slug":"t-inv-2t","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/pt-pt\/t-inv-2t\/","title":{"rendered":"INV.T.2C"},"content":{"rendered":"

A fun\u00e7\u00e3o T.INV.2T no Microsoft Excel e INV.T.2C no Google Planilhas \u00e9 empregada para calcular o inverso da distribui\u00e7\u00e3o t de Student. Utilizada amplamente em an\u00e1lises estat\u00edsticas, essa fun\u00e7\u00e3o \u00e9 especialmente valiosa para a realiza\u00e7\u00e3o de testes de hip\u00f3teses e estima\u00e7\u00e3o de intervalos de confian\u00e7a. Ela \u00e9 tamb\u00e9m fundamental para determina\u00e7\u00e3o de valores cr\u00edticos em testes t.<\/p>\n

Sintaxe e Exemplos de Uso<\/h2>\n

A sintaxe desta fun\u00e7\u00e3o \u00e9:<\/p>\n

=T.INV.2T(probabilidade, graus_de_liberdade)<\/code><\/pre>\n
onde:<\/p>\n
    \n
  • probabilidade<\/strong> \u00e9 a probabilidade correspondente \u00e0 parte bicaudal da distribui\u00e7\u00e3o t de Student.<\/li>\n
  • graus_de_liberdade<\/strong> referem-se ao n\u00famero de graus de liberdade da distribui\u00e7\u00e3o.<\/li>\n<\/ul>\n
    Por exemplo, para determinar o valor t correspondente ao percentil de 90% (probabilidade de 0,10, considerando ambas as caudas) com 10 graus de liberdade, voc\u00ea utilizar\u00e1:<\/p>\n
    =T.INV.2T(0.10, 10)<\/code><\/pre>\n
    No Google Planilhas, seria:<\/p>\n
    =INV.T.2C(0.10, 10)<\/code><\/pre>\n
    Aplica\u00e7\u00f5es Pr\u00e1ticas<\/h2>\n
    Confira como essa fun\u00e7\u00e3o pode ser empregada em contextos reais:<\/p>\n
    1. Determina\u00e7\u00e3o de Valores Cr\u00edticos em Testes de Hip\u00f3teses<\/h2>\n
    Imagine que voc\u00ea est\u00e1 realizando um teste t para comparar duas m\u00e9dias independentes. O n\u00edvel de signific\u00e2ncia escolhido \u00e9 de 5% (\u03b1 = 0.05), e o n\u00famero total de graus de liberdade das duas amostras \u00e9 18. O objetivo \u00e9 identificar o valor cr\u00edtico t para essa configura\u00e7\u00e3o.<\/p>\n
      \n
    • No Excel, voc\u00ea escreveria:<\/li>\n<\/ul>\n
      =T.INV.2T(0.05, 18)<\/code><\/pre>\n
        \n
      • No Google Planilhas, seria:<\/li>\n<\/ul>\n
        =INV.T.2C(0.05, 18)<\/code><\/pre>\n
        Este valor cr\u00edtico define a regi\u00e3o de rejei\u00e7\u00e3o do teste, onde valores de t observados acima do valor cr\u00edtico (absoluto) resultariam na rejei\u00e7\u00e3o da hip\u00f3tese nula.<\/p>\n
        2. Estimativa de Intervalos de Confian\u00e7a para M\u00e9dias<\/h2>\n
        Para calcular um intervalo de confian\u00e7a de 95% para a m\u00e9dia de uma amostra, assumindo uma distribui\u00e7\u00e3o aproximadamente normal com 15 graus de liberdade, o primeiro passo \u00e9 encontrar os valores cr\u00edticos utilizando T.INV.2T ou INV.T.2C.<\/p>\n
          \n
        • No Excel:<\/li>\n<\/ul>\n
          =T.INV.2T(0.05, 15)<\/code><\/pre>\n
            \n
          • No Google Planilhas:<\/li>\n<\/ul>\n
            =INV.T.2C(0.05, 15)<\/code><\/pre>\n
            Esses valores ser\u00e3o usados para multiplicar pelo erro padr\u00e3o da m\u00e9dia, adicionando e subtraindo do valor m\u00e9dio amostral para estabelecer o intervalo.<\/p>\n
            Esses exemplos destacam as aplica\u00e7\u00f5es mais habituais das fun\u00e7\u00f5es T.INV.2T e INV.T.2C em an\u00e1lises que utilizam a distribui\u00e7\u00e3o t de Student, sendo essenciais para pesquisadores, analistas de dados e profissionais envolvidos com infer\u00eancia estat\u00edstica.<\/p>\n","protected":false},"excerpt":{"rendered":"
            Devolve o inverso da distribui\u00e7\u00e3o t de Student<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[442],"tags":[],"class_list":["post-11160","post","type-post","status-publish","format-standard","hentry","category-estatistica"],"acf":[],"yoast_head":"\nFun\u00e7\u00e3o T.INV.2T (INV.T.2C) no Excel \u2013 como funciona, exemplos e sintaxe<\/title>\n<meta name=\"description\" content=\"Breve descri\u00e7\u00e3o da fun\u00e7\u00e3o T.INV.2T (INV.T.2C) do Excel. 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