Answered

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Suppose the scores of students on an exam are normally distributed with a mean of 450 and a standard deviation of 85. According to the empirical rule, what percentage of students scored between 195 and 705 on the exam?

Sagot :

In this case we can see that we are looking for the interval that falls three standard deviations either side of the mean.

Therefore, the answer is 99.7%.

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