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If a sample of 23 adults are randomly selected, find the probability that the sample mean will be less than 21 minutes? 2. The average

If a sample of 23 adults are randomly selected, find the probability that the sample mean will be less than 21 minutes?

2. The average commute to work (one way) is u =22 minutes according to one study. Assume the variable is normally distributed with a standard deviation of o = 4.2 minutes, what is the probability that

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