Dabbs and Morris (1990) examined archival data from military records to study the relationship between high testosterone levels and antisocial behavior in males. Out of the 4,016 men in the normal testosterone group, 10.0% had a record of adult delinquency. Out of the 446 men in the high testosterone group, 22.6% had a record of adult delinquency.
(a) Create a contingency table of frequencies, classifying men by High and Normal testosterone levels and by Delinquency and Nondelinquency.
(b) Compute x2 for this table.
(c) Draw the appropriate conclusions.