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April 20, 2014

Homework Help: statistics

Posted by lupita on Wednesday, May 9, 2012 at 11:47pm.

The number of cars sold annually by used car salespeople is normally distributed with a standard deviation of 18. A random sample of 310 salespeople was taken and the mean number of cars sold annually was found to be 71. Find the 94% confidence interval estimate of the population mean.

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