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An educational study uses a simple pre-post design to assess the efficacy of a computer tutor for solving inequalities. Twelve pilot students participate. Each student is given a pretest, then participates in six sessions using the tutor, then is given a parallel posttest. The data are as follows:
Subj.
pre
post
1
10
13
2
11
6
3
9
18
4
17
5
8
14
7
12
20
16
Using the menu systems, request descriptive statistics (mean, s.d. and variance) for both your original variables ("pre" & "post") and your new transformed variables W0 & W1. Again, PASTE your commands. SAVE and print out the syntax file and turn it in with your assignment.
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