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    Investigating perfectionism on the job

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    Chapter 12, Exercises: 28

    The personnel director of Cander Machine Products is investigating "perfectionism" on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees. The scores ranged from 20 to about 40. One of the facets of the study involved the early background of each employee. Did the employee come from a rural background, a small city, or a large city? The scores are:

    Rural Area, Small Urban Area, Large Urban Area
    35 28 24
    30 24 28
    36 25 26
    38 30 30
    29 32 34
    34 28
    31

    1. At the .05 level, can it be concluded that there is a difference in the three mean scores?
    2. If the null hypothesis is rejected, can you state that the mean score of those with a rural background is different from the score of those with a large-city background?

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