# ap stats

1. ### Standard deviation comparison question

Two college roommates have each committed to donating to charity each week for the next year. The roomates' weekly incomes are independent of each other. Suppose the amount donated in a week by one roommate is approximately normal with mean $30 and standard deviation$10, and the amount donated...
2. ### Looking for help with the Mann-Whitney U Test

Hey, I'm a highschool student finishing up with AP Statistics. In my final project, I am using the Mann-Whitney U Test to compare two un-normal data sets, but this test is beyond the scope of the course, and I have never really learned how to do it. The descriptions I have found on how to carry...