2. Alcohol Abuse and Dependence in College. A report found that 25% of college students had abused alcohol in the last 12 months, whereas an additional 6% (not counted in the 25%) were alcohol-dependent.⁹ Suppose that a new survey of 1000 randomly selected college students finds 275 who had abused alcohol in the last 12 months and an additional 50 (not counted in the 275) who are alcohol-dependent. Test whether the population proportions have changed, using level of significance .