SOLUTION: The number of motorcycles sold annually by salespeople is normally distributed with a standard deviation of 15. A random sample of 300 salespeople taken and the mean number of moto
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Question 1192242: The number of motorcycles sold annually by salespeople is normally distributed with a standard deviation of 15. A random sample of 300 salespeople taken and the mean number of motorcycles sold annually was found to be 75. Find the 99% confidence interval estimate of the population mean. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! 99% half-interval is z*sqrt(p*(1-p)/n)
=2.576*sqrt(.25*.75/300)
=0.0644
the interval is mean+/- half-interval
(0.1856, 0.3144)
