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A researcher selects a pair of random samples. In Group 1 the scores are 10, 4, 12, 5, 4, 6, 8, 7. In Group 2 the scores are 6, 4, 9, 3, 2, 5, 7, 4.
a. Find the t ratio
b. As a two-tail t, should Ho be rejected? If rejected, state the probability of the alpha error.
c. Do the two groups represent a single population?
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