Binge drinking by gender. Wechsler and coworkers (1994) found that 19.4% of students at 4-year U.S. colleges engaged in frequent binge drinking. Table 18.27 reports the data from this study by gender.

TABLE 18.27 Data for Exercise 18.22. Frequency of binge drinking by gender. Binge drinking is defined as having five or more drinks in a row three or more times during the past 2-week period.

Binge + Binge −

Men 1630 5550 Women 1684 8232 Data from Wechsler, H., Davenport, A., Dowdall, G., Moeykens, B., &

Castillo, S. (1994). Health and behavioral consequences of binge drinking in college. A national survey of students at 140 campuses. JAMA, 272(21), 1672–

1677.

(a) Calculate the prevalence of binge drinking for males and for females separately.

(b) Fill in this blank: In absolute terms, males had a ____% greater prevalence of binge drinking than females.

(c) Fill in this blank: In relative terms, males had a ____% greater prevalence of binge drinking than females.

(d) Calculate a 95% confidence interval for the prevalence ratio of binge drinking for males.