Paired Samples T Test Graph. By default spss gives you error bars which assume. The motivation for performing a paired samples t test.
The paired samples t test window opens where you will specify the variables to be used in the analysis. The t tests and related nonparametric tests compare exactly two groups. The graph on the right shows these differences.
The critical value is t α 2 n 1 for a two sided test and t α n 1 for a one sided test.
Suppose we want to know whether a certain study program significantly impacts student performance on a particular exam. All of the variables in your dataset appear in the list on the left side. The mean is the difference between the sample means. The assumptions that should be met to perform a paired samples t test.
