Question: I have two pre/post test data sets. I thought I would do a t-test on the differences of the scores but I am not sure

I have two pre/post test data sets. I thought I would do a t-test on the differences of the scores but I am not sure if that is correct? I already have the means of both groups, but am stuck. These are just the original numbers. The mean is .2 for the control and -3.72 for the experimental. The test is supposed to go down if the clients are getting better, did I do that correctly?

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