Saturday

August 30, 2014

August 30, 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.

**Related Questions**

Statistics - The standard deviation of GPAs (grade point averages) of all male ...

college stats - can someone please explain the steps: suppose that the grade ...

statistics - Assuming that the population variances are equal for Male and ...

statistics - 14) You wish to compare the average GPA of students from one ...

Statistic - At one college, GPA's are normally distributed with a mean of 2.7 ...

statistics.urgent please help.. - A local college cafeteria has a self-service ...

statistics - In a study of the effect of college student employment on academic ...

statistics - suppose we went to test the claim that the average GPA of all ...

statistics - Assume that the population of heights of female college students ...

statistics - The GPAs of all students enrolled at a large university have an ...