User Guide

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Chapter 11
Figure 11-6
Means dialog box (layer 2)
E Select O
wns PDA (ownpda) and move it to the Independent List in layer 2.
E Click OK
to run the procedure.
Paired-Samples T Test
When the data are structured in such a way that there are two observations on
the same
individual or observations that are matched by another variable on two
individuals (twins, for example), the samples are paired. In the data file dietstudy.sav,
the beginning and final weights are provided for each person who participated in the
study. I
f the diet worked, we expect that the participant’s weight before and after the
study would be significantly different.
To carry out a t test of the beginning and final weights, use the following steps:
E Open the data file dietstudy.sav, which can be found in the \tutorial\sample_files\
subdirectory of the directory in which you installed SPSS.