Find the probability that the mean of a sample of size 90, Basic Statistics

Find the probability that the mean of a sample of size 90

Question: A population has mean 12 and standard deviation 1.5.

a. Find the mean and standard deviation of X‾ for samples of size 90.

b. Find the probability that the mean of a sample of size 90 will differ from the population mean 12 by at least 0.3 unit, that is, is either less than 11.7 or more than 12.3.

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Basic Statistics: Find the probability that the mean of a sample of size 90

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Basic Statistics: Find the probability that the mean of a sample of size 90

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