With a paired t, a significant correlation has the effect of reducing the
value of the estimated standard error of difference.
Indicate whether the statement is true or false
Question 2
A researcher selects a pair of random samples and predicts beforehand
that Group 2 will score higher than Group 1. The scores in Group 1 are 11, 10,
8, 3, 7, 1. The scores in Group 2 are 12, 11, 8, 4, 9, 2.
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?
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