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Given a normal distribution with -100 and o-10. There is a 65% chance that a randomly selected item is above what value? Part b)

 

Given a normal distribution with -100 and o-10. There is a 65% chance that a randomly selected item is above what value? Part b) An operations manager selected a sample of 64 of waiting times for walk-in customers. If the population of waiting times has a mean of 15 minutes and a standard deviation of 4 minutes, What is the probability that sample mean is less than 16 minutes?

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