Suppose the scores of students on an exam are Normally distributed with a mean of 297 and a standard deviation of 66. Then approximately 99.7% of the exam scores lie between the numbers _____and _______such that the mean is halfway between these two integers.

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  1. you can play around with Z table stuff at

    It has very nice input forms so you can specify tails or middle regions.

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  2. 363-231

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