Find probability that mean aptitude test score is in range

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Reference no: EM13126847

Assume that the mean score on a certain aptitude test across the nation is 100, and that the standard deviation is 20 points. Find the probability that the mean aptitude test score for a randomly selected group of 150 8th graders is between 101.5 and 98.5.

Reference no: EM13126847

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