Suppose a professional job-placement firm that monitors salaries in professional fields is interested in determining if the
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a. Conduct a hypothesis test to determine whether the mean starting salary for 2007 graduates in chemical engineering is higher than the mean starting salary for 2007 graduates in electrical engineering. Conduct the test at the 0.05 level of significance. Be sure to state a conclusion. (Assume that the firm believes the two populations from which the samples were taken are approximately normally distributed with equal variances.)
b. Suppose the job-placement firm is unwilling to assume that the two populations are normally distributed with equal variances. Conduct the appropriate hypothesis test to determine whether a difference exists between the mean starting salaries for the two groups. Use a level of significance of 0.05. What conclusion should the job-placement firm reach based on the hypothesis test?
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Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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