LIR832-Fall-2004-midterm-examination

# LIR832-Fall-2004-midterm-examination - LIR 832: Mid-term...

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Page 1 of 15 LIR 832: Mid-term Examination: Fall, 2003 Each Problem is worth 20 points. Answer five of the six problems. Problems should be answered as thoroughly as you are able. Partial credit on problems is only possible if I can locate errors in your calculations; neatness and organization of your answers is essential Remember, answer only five of the six problems, if you chose to answer all, I will select the five with the lowest scores. 1. Employers depend on their supervisors evaluating their subordinates accurately as pay increases, promotion and discipline are largely driven by supervisors views of their subordinates. For better or worse, a substantial proportion of supervisors views are subjective. Further, different supervisors have different criteria for evaluation of subordinates. Differences in criteria can lead to systematic differences in the ratings of subordinates, with predictable consequences for the subordinates. Take the case of an establishment with 70 employees and two supervisors. The employees are divided into two groups of 35. The two groups do similar work under similar conditions. Supervisors turn in evaluations of all of their subordinates each August 31. We are curious about whether our two supervisors apply our evaluation criteria consistently, so that employees are not disadvantaged by working for one or the other supervisor. We decide to use the current evaluations to test whether the supervisors are consistent with one another (by the way, we have no reason to believe that their employees differ in their performance in any consistent fashion). A. Calling the first supervisor A and the second supervisor B, set up a null and alternative hypothesis to test whether the supervisors are different. Is this a one or two tailed test?

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Page 2 of 15 B. We calculate the mean and standard deviation for each supervisors subordinates. For supervisor A, the mean of the evaluation is 3.0 with a standard deviation of 1.3; for supervisor B the mean is 3.4 with a standard deviation of .5. Can you reject the null in a 10% test? A 5% test? A 1% test? C. Explain what it means to reject the null in a 5% test.
Page 3 of 15 2. Safety is an important issue in construction, the industry has one of the highest rates of fatal and non-fatal injuries of any industry in the United States. In some occupations, such as structural iron work, workers compensation payments can be equal to payroll.

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## This note was uploaded on 07/25/2008 for the course LIR 832 taught by Professor Belman during the Spring '07 term at Michigan State University.

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LIR832-Fall-2004-midterm-examination - LIR 832: Mid-term...

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