Question: The scores on an aptitude test required for entry into a certain job position have a mean of 500 and a standard deviation of 120.

  • The scores on an aptitude test required for entry into a certain job position have a mean of 500 and a standard deviation of 120. If a random sample of 36 applicants has a mean of 546, is there evidence that their mean score is different from the mean that is expected from all applicants?

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