3/16/2024 0 Comments Paired sample t-test spss![]() Note that SPSS will first display a test on homogeneity of variances. After keyword VARIABLES, the (metric) variable(s) is or are mentioned with respect to which the groups are compared. The values indicating group membership are made explicit in parentheses. In the command for the independent samples case, after keyword GROUPS the variable is named that indicates to which group each case belongs. T-TEST PAIRS = var31 var32 WITH var33 (PAIRED). T-TEST PAIRS = var31 var32 var33 (PAIRED). Finally, one or more means from a single sample may be tested against a pre-defined value.Įxample for independent samples: T-TEST GROUPS = var17 (1,2) ![]() The latter cases arises if a sample is compared "to itself", as it were, e.g., if the first and the present salary of individuals is compared. These group means may come from two independent samples (say, one sample of boys and one of girls, or samples from two school classes) or from "paired" samples. The T-test is used to test whether a difference between two group means is statistically significant. ![]()
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