statistical test

I have a survey question that asks which of 3 activities participants regularly participate in. They are told “select all that apply.” So they can mark any or all of the activities. As results, I get frequencies (# and %) for each activity. Now I want to compare the frequencies of the...

Hi, Let's say I'm a poor disk provider. I allow people to upload and remote access to files on my computer. Since I'm poor I don't have budget to upgrade my disk. Thus, I established a database to record the number of time of access and last access date for every files. One day, my...

I have two groups of participants; 1 group received treatment A and the other group received treatment B. I have the mean scores of the effectiveness for both groups. Group A mean score before treatment was 35 and after treament 20 Group B mean score before treatment was 25 and after...

Suppose we have two processes A and B, and N subjects, x_i. A(x) is distributed as a Maxwell-Boltzmann distribution with scale parameter alpha_a; B(x) is distributed as a Maxwell-Boltzmann distribution with scale parameter alpha_b. Our experiment measures A(x_i) and B(x_i) for each subject...