Question: Question # 5 A researcher wanted to estimate the difference between the percentages of users of two toothpastes who will never switch to another toothpaste.

Question # 5

A researcher wanted to estimate the difference between the percentages of users of two toothpastes who will never switch to another toothpaste. In a sample of 500 users of Toothpaste A taken by this researcher, 100 said that they will never switch to another toothpaste. In another sample of 400 users of Toothpaste B taken by the same researcher, 68 said that they will never switch to another toothpaste.Let p1 and p2 be the proportions of all users of Toothpastes A and B, respectively, who will never switch to another toothpaste.

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