Use the Following Information for Questions

Multiple Choice

Use the following information for questions:
A marketing research group shows three different television advertisements for the same product to each of sixty people to see if the ads are equally effective or not. Each participant is asked which of the three advertisements they believe is most effective. The following table summarizes the counts of how many people found each advertisement to be the most effective.
-What is an appropriate null hypothesis for this study?

A) In the sample, the advertisements are not believed to be equally effective.
B) In the population represented by the sample, the advertisements are not believed to be equally effective.
C) In the sample, equal proportions of people believe each advertisement to be most effective.
D) In the population represented by the sample, equal proportions of people would believe each advertisement to be most effective.