The Number of Students Using the ATM on Campus Daily

question 45

Essay

The number of students using the ATM on campus daily is normally distributed with a mean of 237.6 and a standard deviation of 26.3.You take a random sample of 30 days.Find two values"a" and"b" that are symmetric around the mean such that the probability is 0.95 that the sample mean is greater than"a" and less than"b".

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