![]() ![]() The procedure computes the differences between values of the two variables for each case and tests whether the average differs from 0. The Paired-Samples T Test procedure compares the means of two variables for a single group. The CLASS and VAR statements cannot be used with the PAIRED statement.Įxamples of the use of the asterisk and the colon are shown in Table 95.3. This feature requires the Statistics Base option. Use the PAIRED statement only for paired comparisons. A pair formed by a variable with itself is ignored. The differences are calculated by taking the variable on the left minus the variable on the right for both the asterisk and colon. The number of variables on the left must equal the number on the right when the colon is used. The colon requests comparisons between the first variable on the left and the first on the right, the second on the left and the second on the right, and so forth. The asterisk requests comparisons between each variable on the left with each variable on the right. Variables or lists of variables are separated by an asterisk (*) or a colon (:). She must use the same exam for all students.The PairLists in the PAIRED statement identifies the variables to be compared in paired comparisons. The practical conclusion made by the instructor is that the tests are not of equal difficulty. You reject the hypothesis that the mean difference is zero.
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