# Search results

1. ### Comparing means

Hello, I hope you can help. I am working with numerical data and I wish to compare means. Data set 1 has N=30 (normally distributed) Data set 2 has N=24 (not normal) Data set 3 has N=24 (not normal) Data set 4 has N=12 (not normal) I used the Shapiro Wilks test to test for normality and any p...
2. ### Applying the Bonferroni Correction to a T-Test considered

Hello! I need your help please:) I am comparing the mean scores for an exam for one class (A) to four different classes (B,C,D,E), such as AB, AC, AD and AE. The data for all classes is normal but in class E. I am performing a T-Test for AB, AC and AD only, but using the Mann Whitney test for...
3. ### Comparing withdrawal rates for a course

Hello!! Which statical test should I use to compare withdrawal rates for a course for two semesters. I know I can report the means but need to know if the difference is significant. For example: Fall2017 10 out of 33 students withdrew Spring2018 5 out of 66 students withdrew Thank you in...
4. ### Which test to use to compare means for normal and non normal data

Hi! I have quantitative test scores I wish to compare. However, one group (n=27) is not normally distributed and the other one (n=21) is normal. Thank you
5. ### Linear Regression

1) What should a sample size at least be, in order to run a linear regression test? Would 18 be too small? 2) Also, can I perform a linear regression test on data that is left skewed. 3) I ran a linear regression test on data that was normal and all seemed to go well, testing signf. However...
6. ### Which test should I use?

I wish to compare test scores from 3 different learning environments (online, f2f and blended) to see which setting preformed better on the common exam the took. The sample size and distribution is: online n=18 (normal), f2f n=27 (left skewed) and blended n=43 (normal). Which statistical test...