Asked by Lee
The mean GPA (grade point averagE. of all male students at a college is 2.77 and the mean GPA of all female students at the same college is 2.89. Suppose we take one sample of 40 male students and another sample of 50 female students from this college. What is the mean of the sampling distribution of the difference between the mean GPAs of these two samples?
how would I solve this problem.
how would I solve this problem.
Answers
Answered by
drwls
No 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.
4/9 * 2.77 + 5/9 * 2.89.
This equals 2.84.
Answered by
David
The 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.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.