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The distribution of grades on a certain test has a mean of

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The distribution of grades on a certain test has a mean of 85.5 with a standard deviation of 11.2. There are 400 tests. Assuming that the grades are normally distributed, predict the number of students scoring between 75 and 95. Use a table of area under the curve within z standard deviations of the mean.

Reference no: EM13636134

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