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.

MATLAB: An Introduction with Applications
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INTERVAL ESTIMATE
Instructions
Instructions
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.
Transcribed Image Text:INTERVAL ESTIMATE Instructions Instructions 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.
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