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Scores on an aptitude test have been observed to be approximately normal with a mean of...

Scores on an aptitude test have been observed to be approximately normal with a mean of 76and a standard deviation of 5.

If 1000 people took the test, how many would you expect to score above 80?

Math   Statistics-And-Probability   
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Answer #1

Refer Standard normal table/Z-table to find the probability OR use excel formula "=NORM.S.DIST(0.80, TRUE)" to find the probability.

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