Calculate the odds ratio of an adult having a head injury as a function of whether or not that adult wears a helmet. (Why could you not do the same thing for children?) Dabbs and Morris (1990)...

Calculate the odds ratio of an adult having a head injury as a function of whether or not that adult wears a helmet. (Why could you not do the same thing for children?) Dabbs and Morris (1990) investigated the effects of elevated testosterone levels in a representative sample of U.S. adult males (mean age 37). Subjects were classified as High (upper 10%) or Normal on testosterone, as high or low on socioeconomic status (SES), and as engaging (or not engaging) in adult delinquency. Their data follow.