Numbers 1.5

Here is the spreadsheet.  The dependent variable would be the students answering the questions. The independent variable would be the questions and the presentation. The most significant difference was found in questions 26 and 27. According to the TTest, there is not enough significance between before and after for questions 28 - 31. I would say that it was not a very successful presentation since there doesn't seem to be much difference in the scores before and after.