# Funções de teste T Funções do teste T são usadas para exame estatístico de duas médias populacionais. Um teste t de duas amostras examina se duas amostras são diferentes. Normalmente é usado quando duas distribuições normais têm variâncias desconhecidas e quando um experimento usa um tamanho pequeno de amostra. Nas seções a seguir, as funções do teste estatístico teste T são agrupadas de acordo com o teste de Student de amostra que se aplicar a cada tipo de função. Use a caixa suspensa em cada função para ver uma breve descrição e a sintaxe de cada função. Clique no nome da função na descrição da sintaxe para obter detalhes. [Criando um relatório t-test típico](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_t_example.htm) ## Dois testes T de amostras independentes As funções a seguir se aplicam a dois testes T de Student de amostras independentes: [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_conf TTest\_conf retorna o valor agregado do intervalo de confiança do teste T para duas amostras independentes. [**ttest_conf**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_conf.htm) ( grp, value [, sig[, eq\_var]]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_df TTest\_df() retorna o valor (graus de liberdade) agregado do teste T de estudante referente a duas séries independentes de valores. [**ttest_df**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_df.htm) (grp, value [, eq\_var) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_dif TTest\_dif() é uma função numérica que retorna a diferença média agregada do teste T de estudantes, referente a duas séries independentes de valores. [**ttest_dif**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_dif.htm) (grp, value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_lower TTest\_lower() retorna o valor agregado da extremidade inferior do intervalo de confiança, referente a duas séries independentes de valores. [**ttest_lower**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_lower.htm) (grp, value [, sig[, eq\_var]]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_sig TTest\_sig() retorna o nível de significância agregado do teste T bicaudal de estudantes, referente a duas séries independentes de valores. [**ttest_sig**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_sig.htm) (grp, value [, eq\_var]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_sterr TTest\_sterr() retorna o erro padrão agregado da diferença média do teste T de estudantes, referente a duas séries independentes de valores. [**ttest_sterr**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_sterr.htm) (grp, value [, eq\_var]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_t TTest\_t() retorna o valor t agregado referente a duas séries independentes de valores. [**ttest_t**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_t.htm) (grp, value [, eq\_var]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest\_upper TTest\_upper() retorna o valor agregado da extremidade inferior do intervalo de confiança, referente a duas séries independentes de valores. [**ttest_upper**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest_upper.htm) (grp, value [, sig [, eq\_var]]) ## Dois testes T de amostras ponderadas independentes As funções a seguir se aplicam a testes T de Student com duas amostras independentes, em que a série de dados de entrada é fornecida em um formato de duas colunas ponderadas: [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_conf TTestw\_conf() retorna o valor t agregado referente a duas séries independentes de valores. [**ttestw_conf**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_conf.htm) (weight, grp, value [, sig[, eq\_var]]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_df TTestw\_df() retorna o valor df (graus de liberdade) agregado do teste T de estudante referente a duas séries independentes de valores. [**ttestw_df**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_df.htm) (weight, grp, value [, eq\_var]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_dif TTestw\_dif() retorna a diferença média agregada do teste T de estudantes, referente a duas séries independentes de valores. [**ttestw_dif**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_dif.htm) ( weight, grp, value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_lower TTestw\_lower() retorna o valor agregado da extremidade inferior do intervalo de confiança, referente a duas séries independentes de valores. [**ttestw_lower**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_lower.htm) (weight, grp, value [, sig[, eq\_var]]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_sig TTestw\_sig() retorna o nível de significância agregado do teste T bicaudal de estudantes, referente a duas séries independentes de valores. [**ttestw_sig**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_sig.htm) ( weight, grp, value [, eq\_var]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_sterr TTestw\_sterr() retorna o erro padrão agregado da diferença média do teste T de estudantes, referente a duas séries independentes de valores. [**ttestw_sterr**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_sterr.htm) (weight, grp, value [, eq\_var]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_t TTestw\_t() retorna o valor t agregado referente a duas séries independentes de valores. [**ttestw_t**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_t.htm) (weight, grp, value [, eq\_var]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttestw\_upper TTestw\_upper() retorna o valor agregado da extremidade inferior do intervalo de confiança, referente a duas séries independentes de valores. [**ttestw_upper**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttestw_upper.htm) (weight, grp, value [, sig [, eq\_var]]) ## Testes T de uma amostra As funções a seguir se aplicam a testes T de Student com uma amostra. [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_conf TTest1\_conf() retorna o valor de intervalo de confiança agregado referente a uma série de valores. [**ttest1_conf**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_conf.htm) (value [, sig]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_df TTest1\_df() retorna o valor df (graus de liberdade) agregado do teste T de estudante referente a uma série de valores. [**ttest1_df**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_df.htm) (value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_dif TTest1\_dif() retorna a diferença média agregada do teste t de student referente a uma série de valores. [**ttest1_dif**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_dif.htm) (value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_lower TTest1\_lower() retorna o valor agregado da extremidade inferior do intervalo de confiança, referente a uma série de valores. [**ttest1_lower**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_lower.htm) (value [, sig]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_sig TTest1\_sig() retorna o nível de significância agregado do teste t de student bicaudal referente a uma série de valores. [**ttest1_sig**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_sig.htm) (value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_sterr TTest1\_sterr() retorna o erro padrão agregado da diferença média do teste T de estudantes, referente a uma série de valores. [**ttest1_sterr**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_sterr.htm) (value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_t TTest1\_t() retorna o valor t agregado para um série de valores. [**ttest1_t**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_t.htm) (value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1\_upper TTest1\_upper() retorna o valor agregado da extremidade superior do intervalo de confiança, referente a uma série de valores. [**ttest1_upper**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1_upper.htm) (value [, sig]) ## Testes T de uma amostra ponderada As funções a seguir se aplicam a testes T de Student com uma amostra, em que a série de dados de entrada é fornecida em um formato de duas colunas ponderadas. [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_conf TTest1w\_conf() é uma função numérica que retorna o valor de intervalo de confiança agregado referente a uma série de valores. [**ttest1w_conf**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_conf.htm) (weight, value [, sig]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_df TTest1w\_df() retorna o valor df (graus de liberdade) agregado do teste T de estudante referente a uma série de valores. [**ttest1w_df**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_df.htm) (weight, value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_dif TTest1w\_dif() retorna a diferença média agregada do teste t de student referente a uma série de valores. [**ttest1w_dif**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_dif.htm) (weight, value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_lower TTest1w\_lower() retorna o valor agregado da extremidade inferior do intervalo de confiança, referente a uma série de valores. [**ttest1w_lower**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_lower.htm) (weight, value [, sig]) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_sig TTest1w\_sig() retorna o nível de significância agregado do teste t de student bicaudal referente a uma série de valores. [**ttest1w_sig**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_sig.htm) (weight, value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_sterr TTest1w\_sterr() retorna o erro padrão agregado da diferença média do teste T de estudantes, referente a uma série de valores. [**ttest1w_sterr**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_sterr.htm) (weight, value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_t TTest1w\_t() retorna o valor t agregado para um série de valores. [**ttest1w_t**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_t.htm) ( weight, value) [](https://help.qlik.com/en-US/qlikview/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/t_tests.htm) #### ttest1w\_upper TTest1w\_upper() retorna o valor agregado da extremidade superior do intervalo de confiança, referente a uma série de valores. [**ttest1w_upper**](https://help.qlik.com/pt-BR/qlikview/September2026/Subsystems/Client/Content/QV_QlikView/ChartFunctions/StatisticalTestFunctions/ttest/ttest1w_upper.htm) (weight, value [, sig])