7.62. A 99% confidence interval for the difference 772 - T between the proportions of men and women in California who are alcoholics equals

(0.02, 0.09).

(a) We are 99% confident that the proportion of alcoholics is between 0.02 and 0.09.

(b) We arc 99% confident that the proportion of men in California who arc alcoholics is between 0.02 and 0.09 larger than the proportion of women in California who are.

(c) At this confidence level, there is insufficient evidence to infer that the population proportions are different.

(d) We are 99% confident that a minority of California residents are alcoholics.

(e) Since the confidence interval does not contain 0, it is impossible that 771 = 772.