11.56 In a study by the United Dairy Industry Association, 42% of 655 persons age 35–44 said they seldom or never ate cottage cheese. For 455 individuals age 45–54, the corresponding percentage was 34%. At the 0.01 level, can we reject the possibility that the population percentages could be equal for these two groups? Source:

United Dairy Industry Association, Cottage Cheese: Attitudes & Usage, p. 21.