10-5 To determine whether or not offspring of parents with type II diabetes have abnormal glucose levels compared to offspring without a parental history of type II diabetes. Gerald Berenson and colleagues* collected data on whether these offspring had different cholesterol levels.

The data for 30 subjects are shown in Table 10-19. Are these data consistent with the hypothesis that these offspring differ in cholesterol levels?

10-6 People with problem gambling habits are often substance abusers; these behaviors may be connected by an underlying personality trait such as impulsivity. Nancy Petry†

investigated whether problem gamblers would also be at higher risk for contracting HIV, since the underlying impulsivity might make problem gamblers more likely to engage in riskier sexual behavior. She administered a questionnaire known as the HIV Risk Behavior Scale (HRBS) to assess sexual risk behavior in two groups of substance abusers, those with and without problem gambling. The HRBS is an 11-item questionnaire with questions addressing drug and sex behavior and responses are coded on a sixpoint scale from 0 to 5, with higher values associated with riskier behavior. The results of the HRBS sex composite score are shown in Table 10-20. What do these data indicate?