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13 June, 18:43

There are 41 students in a Statistics class. The professor knows from experience that the time to grade one exam follows a normal distribution with average 8.8 minutes and standard deviation 3.2 minutes.

What is the average time and standard deviation to grade 41 exams

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  1. 13 June, 21:42
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    The average time is 360.8 minutes and the standard deviation is 131.2
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