14.7 Several types of puddings are sold in a small general store in London. From a past study of customer selections, the owner knows that 25% of the customers ordered strawberry pudding; 30% orderedchocolate;

19% ordered lemon; 12% ordered mango; and the remainder, vanilla. Now the owner, who thinks customer preferences have changed, uses a random sample of 80 customers to find that 17 prefer strawberry, 17 prefer chocolate, 30 prefer lemon, 7 prefer vanilla, and the remainder prefer mango. Determine if the customers’

preferences have changed from the last study.