Question: According to a report owners are using an average 20 apps per month. Assume that the number of apps used per month by owners is

According to a report owners are using an average 20 apps per month. Assume that the number of apps used per month by owners is normally distributed and that the standard deviation is 4. If yo select a random sample of 25 owners what is the probability that the sample mean is between 19.5 and 20.5?

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