Posted by Lisa on Sunday, May 30, 2010 at 2:21am.
I'll give you a few hints. You might try a correlated or dependent groups t-test on this situation. In a test of this type, each subject participates in two research conditions (a "before treatment" condition and an "after treatment" condition). In symbolic form, the null hypothesis would state the population means are equal and the alternate hypothesis would state the population means are not equal. If the null is rejected and the alternate accepted, you would then be able to conclude a statistical difference.
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