I would like to compare before-and-after "scores" on five quality of life questions across two groups. What I would like to know are:
- Are the baseline scores across the two groups similar?
- Is the change in scores significant (before and after) within each group?
- Is the change in scores significant across both groups?
Will an independent t-test suffice to answer question number 1?
Will it be appropriate to perform a Wilcoxon signed rank test to answer question number 2? If not, what will be the more appropriate test?
On question 3, is Mann-whitney appropriate?
Thank you so much for the help.