Data on self-esteem, leadership ability, and GPA were used to compare college students who were hired as resident assistants at Mississippi State University and those who were not hired (“Wellness as a Factor in University Housing,” Journal of College Student Development [1994]: 248–254), as shown in the accompanying table.

a. Do the data suggest that the true mean self-esteem score for students hired by the university as resident assistants differs from the mean for students who are not hired? Test the relevant hypotheses using α = .05.

b. Do the data suggest that the true mean leadership score for students hired by the university as resident assistants differs from the mean for students who are not hired? Test the relevant hypotheses using α = .05.

c. Do the data suggest that the true mean GPA for students hired by the university as resident assistants differs from the mean for students who are not hired? Test the relevant hypotheses using α = .05.

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Leadership GPA X S X S X S Hired (n = 69) 83.28 12.21 62.51 3.05 2.94 61 Not Hired (n = 47) 81.96 12.78 62.43 3.36 2.60 79 Self-Esteem