Suppose the number of students in a class for the Business Statistics program at a University has a mean of 23 with a standard deviation of 4.3. If 15 classes are selected randomly, find the probability that the mean number of students is between 20 and 30.
0.9699
0.9966
0.8412
0.6824

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@sweetburger

@UsukiDoll

I haven't studied statistics. Sorry :/

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