Researchers compared varsity football and hockey players (contact athletes) with varsity athletes from noncontact sports to determine whether exposure to head impacts during one season have an effect on cognitive performance. In the study, tests of new learning performance were significantly poorer for the contact sport athletes compared to the noncontact sport athletes.

What statistical test did the researchers use?

Repeated measures t-test

Independent samples t-test

One-way ANOVA

Correlation

Regression

One-sample t-test

z-test

Then, answer why you chose the test you did?