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28 December, 03:42

Professor Scott has 84 students in his college mathematics lecture class. The scores on the midterm exam are normally distributed with a mean of 72.3 and a standard deviation of 8.9. How many students in the class can be expected to receive a score between 63.4 and 81.2? Express the answer to the nearest student.

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  1. 28 December, 04:10
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    A suitable calculator can show you the number of students having a score in that range is expected to be about 57.
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