So, I just had a killer final, and I'll be glad if anyone can help me answer some questions I have about hypothesis testing.

1) 
Say I have 2 classes, and I have a sample from one of them, Class A. I want to find out if the average number of class units the students are taking in Class A are different from another class, Class B ( Read more... )

I have such-and-such events each falling into one of ten categories. The distribution among categories is very obviously nonrandom, and a simple chi-square test shows this quite certainly. (Four categories have zero events, four have 0-15% each, two categories hold the rest ( Read more... )

I need some help concerning the Mann-Whitney U test ( Read more... )

I have a set of data of 50 SAT scores all of which I've entered into a table with class/frequency/mid-point/relative frequency. One of the questions I have to answer in my textbook is "If you want to accept the top 88% of the applicants, what should the minimum score be ( Read more... )

I have a problem with dice. Say I have a single six-sided die. I'm looking to roll the die and achieve a 4+. I know this has a 50% chance of success. If I'm then rolling two dice, what's the chance at least one will roll a 4 ( Read more... )