A Researcher Selects a Pair of Random Samples and Predicts

Short Answer

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?