Homework Help: statistics

Posted by Cindy on Friday, October 22, 2010 at 11:57am.

At a large publishing company, the mean age of proofreaders is 36.2 years, and the standard deviation is 3.7 years. If a random sample of 15 proofreaders is selected, find the probability that the mean age of the proofreaders in the sample will be between 36 and 37.5 years.Assume the variable is normally distributed.

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