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March 28, 2015

Homework Help: Statistics

Posted by Erinn on Tuesday, April 26, 2011 at 3:37pm.

Suppose the mean income of 35-year-olds in the U.S. is $25,000. A random sample of 150 35-year-olds in California results in a sample mean income of $26,600 and a sample standard deviation of $3800. At the 5% significance level, can we conclude that the true mean income of 35-year-old Californians is greater than that of the nation, in general?

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