# statistical test

1. ### Parametric or non-parametric for 2 sets of data being compared one normal one not

Hi folks, I am in a dilemma and maybe one of you can help. I have 2 sets of data, one from a control group and one from an experiment group. Each group took a test before and after a period of time and difference calculated. When checking for normality within the data via Anderson-Darling I...
2. ### small sample size

Hi everyone! Nice to meet people do same things on the web:) Here the question: I have independent two group of patients first group have 10 patients second have 5 patients can I compare their surgical corrections (advancement measured as milimeters) with ManWhitney test? (since the...
3. ### Likert Scale Help

Hello everyone! I am in a statistics course and writing my first research paper using my own data analysis and I could really use some help determining what statistical test to use. I am using STATA and ANES data. All of my variables are likert scale variables which I have coded -3 to 3...
4. ### comparing frequencies

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...
5. ### "which file should be deleted ?" using statistics theory

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...
6. ### test whether 2 mean scores are significantly different

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...
7. ### Statistical test for two Maxwell-Boltzmann distributions

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...