Participants took before and after surveys. Surveys were "graded" out of total available points per survey to determine "humane" scores. Two surveys were made: one for younger children, one for older children. I would like to determine whether there is a significant difference between the before and after scores for the young children, before and after scores for the older children, and before and after scores for all children.

The main issue I'm having is due to the fact that my sample sizes are not equal in the before and after categories, for younger, older, AND total. Some parents rushed their kids right out after the program and I wasn't able to get their scores. Does this have any bearing?

I really don't have an issue with performing or interpreting the tests, but choosing one is my downfall. I just don't know where to start!

Thanks for any help or suggestions!