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Given the mean of the difference scores is 7.0, standard deviation of the difference scores is 2.8, and there were 25 in the sample, solve

Given the mean of the difference scores is 7.0, standard deviation of the difference scores is 2.8, and there were 25 in the sample, solve for the following problems, showing all work to receive full credit:

Calculate the correlated-groups t test to determine the t_obt.

If this is a non-directional test, what is the t _cv?

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