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June 30, 2015

Homework Help: Statistics

Posted by Kennon on Tuesday, November 18, 2008 at 3:03pm.

A study was conducted to estimate the mean amount spent on Christmas gifts for a typical family having two children. A sample of size 150 was taken, and the mean amount spent was $225. Assuming a standard deviation equal to $50, find a 95% confidence interval for , the mean for all such families.

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