# Analyzing pre and post-intervention measurements without control group

I have little knowledge of statistics and was wondering what tests to use for an evidence-based project (not research, so I am not using a control group) that I am conducting.

• What statistical test would I use for pre and post knowledge tests after a student educational intervention?

• Also, are numeric test results considered interval data and would I being looking for the difference in means between the pre and post knowledge tests?

I also have pre- and post-confidence scores that have one negative value:

0: do not agree


and two positive values:

1: somewhat agree and
2: strongly agree;


What statistical test would I use for the confidence survey? Would this be ordinal data and again would I be looking for the mean difference between the pre- and post-confidence surveys?

• Last time I checked, "research" does not require a control group. – Thomas Jun 16 '13 at 18:21
• I'm also not sure how this fails to count as research. – Glen_b Jun 17 '13 at 6:26