In a study, participants were asked to plunge a hand into icy water and keep it there as long as the pain would allow. In one condition, the participants repeated their favorite curse words while their hands were in the water. In the other condition, the same participants repeated a neutral word. Participants assessed how painful the water was in each condition.

Which statistical test will you use?

Repeated measures t-test

One-way ANOVA

z-test

One-sample t-test

Independent samples t-test

Correlation

Regression

Then, answer why you would use that test?