We Want to Compare the Scores of Different Groups on a Measure

Multiple Choice

We want to compare the scores of different groups on a measure of reaction time. Three different groups were studied: patients with recent head injuries, patients with head injuries that occurred a year ago, and a control group of non-injured people. We want to know which group of people has the fastest reaction time. What is the best statistical test to use to find this out?

A) one way ANOVA
B) factorial ANOVA
C) paired samples t-test
D) correlation