Calculate the odds ratio of adult delinquency for the data in Exercise 19.18.

Exercise 19.18

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) Plot the data in a way as to illustrate this relationship.

d) Draw the appropriate conclusions.