Homework Help: statistics

Posted by Tammy on Monday, June 13, 2011 at 12:51pm.

A researcher wants to estimate the average time (in minutes) spent in a car daily. This will be done by randomly surveying 300 individuals and calculating the sample mean. Find the probability that the estimate will be in error by less than 5 minutes. Assume that the population standard deviation is 45 minutes.

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