Statistics: T-test – #1527

Question: IQ tests were administered to 12 subjects at 8 a.m. Two months later, the same test was administered to the same subjects at 4 p.m. Test at the .01 level to see if there is a difference in the performances.

State the hypotheses and identify the claim, find the critical value(s), compute the test value, and make the decision, summarize the results.


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