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December 20, 2014

December 20, 2014

Posted by **Lee** on Friday, January 30, 2009 at 7:41pm.

how would I solve this problem.

- statistics -
**drwls**, Friday, January 30, 2009 at 8:36pmNo matter what the standard deviation of the distributions is, the mean of the GPA of both samples will be the weighted mean, which is

4/9 * 2.77 + 5/9 * 2.89.

This equals 2.84.

- statistics -
**David**, Wednesday, February 11, 2009 at 6:20pmThe questioner doesn't want the weighted mean, she wants the mean of the difference. This is equal to the difference between the means, or 0.12.

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