The scores on a test have a mean of 100 and a standard deviation of 15. If a personnel manager wants to select from the top 75% of applicants who take the test, find the cutoff score. The score results are normally distributed.
Added by Jill E.
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This is because the z-score tells us how many standard deviations away from the mean a particular score is. Looking up in the z-table, we find that the z-score that corresponds to the top 75% of the distribution is approximately 0.67. Show more…
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