Taylah is a forensic psychologist. She is interested in answering the question, which group is better at recognizing lies in an interview: Police or lawyers? She conducts a study in which her participants view a video of a suspect being interviewed. The suspect makes several statements in the interview. The participants’ task is to identify from the suspect’s body language (including facial expressions) when he is lying. The participants view the video individually. There are 14 police and 15 lawyers. In this study what sort of analysis should Taylah conduct?