Suppose the scores of students on an exam are Normally distributed with a mean of 375 and a standard deviation of 88. Then approximately 99.7% of the exam scores lie between the numbers ______ and ______ such that the mean is halfway between these two integers.
Added by Emily B.
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7% of the scores. Since the Normal distribution is symmetric, we can use the empirical rule to determine that approximately 99.7% of the scores lie within 3 standard deviations of the mean. So, 3 standard deviations = 3 * 88 = 264. Show more…
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