A researcher selects a pair of random samples and predicts beforehand that Group 1 will score higher than Group 2. The scores in Group 1 are 6, 7, 10, 9, 8. The scores in Group 2 are 3, 4, 9, 7, 5
a. Find the t ratio
b. As a one-tail t, should Ho be rejected?
If rejected, state the probability of the alpha error.
c. Do the two groups represent a single population?
a t=1.863
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