Question

A random sample of the scores of 100 applicants for clerk-typist positions at a large insurance company showed a mean score of 72.6. The preparer of the test maintained that qualified applicants should average 75.0.
a. Determine the 99% confidence interval for the mean score of all applicants at the insurance company. Assume that the standard deviation of test scores is 10.5.
b. Can the insurance company conclude that it is getting qualified applicants (as measured by this test)?


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  • CreatedAugust 28, 2015
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