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April 19, 2014

Homework Help: Statistics

Posted by Alison on Monday, December 17, 2012 at 11:16pm.

An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for , the average annual salary of all high school teachers.

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