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help me with this question obtained, the mean of the population is A random sample of size 100 is drawn from a population with a

help me with this question

obtained, the mean of the population is A random sample of size 100 is drawn from a population with a standard deviation of 10, If only 1506 of the time a sample mean greater than 20 is 18.96 9.60 18.35 19.61 20.35

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