How do you perform the One-way ANOVAs

A researcher is interested in examining whether knowledge of a previous criminal record will affect the jury�fs decision to acquit or convict the defendant. The researcher shows 15 participants a 4-hour trial in which a woman is accused of passing bad checks. Participants were divided into three groups based on what they were told about the defendant�fs criminal past: criminal record group (defendant had a criminal past), clean record (no criminal past), or no information group (no information regarding criminal past). Participant�fs then rated the defendant from 1 (completely innocent) to 10 (completely guilty). The data are presented below. Perform the appropriate statistical test (using statistical hypothesis testing) and any necessary post hoc tests to determine whether prior criminal history affects juries.
n=5 ‡”X2 = 589 T1= 40 T2= 20 T3=5