Question

which option is an example of a survey?

a. having customers fill out a questionnaire about their favorite brand of toothpaste

b. testing the effectiveness of a mouthwash by allowing one group to use it and comparing the results with those of a group that doesnt use it

c. placing different groups of people in different colored rooms and recording their mood

d. finding the number of red jellybeans in an average jar of jellybeans by counting

Explanation:

A survey typically involves collecting data from a group via questionnaires or interviews. Option A has customers fill out a questionnaire (a common survey method) to gather info on their favorite toothpaste brand. Option B is an experiment (testing effectiveness with control group), C is an experiment studying mood and color, D is counting (not a survey).

Answer:

A. Having customers fill out a questionnaire about their favorite brand of toothpaste