Question

A marketing company wants to know if people who like brand X soda also like brand Y potato chips. Which procedure is the most appropriate to answer the question?

A. Randomly choose two groups. Ask one group if they like brand X soda and ask the other group if they like brand Y potato chips.

B. Randomly choose a group. Ask them if they like both brand X soda AND brand Y potato chips.

C. Ask a random group to choose two things they like from a list of 10 food items, where two of the choices are brand X soda and brand Y potato chips.

D. Ask a random group two questions: Do you like brand X soda? Do you like brand Y potato chips?

Answer 1

D. Ask a random group two questions: Do you like brand X soda? Do you like brand Y potato chips?

Explanation:

The correct answer is D.

The group has to be chosen randomly. However, in option B, the person could simple answer no if asked if the liked both soda and potato chips and they only liked one.

In D, the person would have to answer for both, and it would be possible to estabilish dependence or independence, for example.