Question

Susie wants to determine the percentage of people in the United States that have a college degree. She conducts an email survey of 150 people randomly selecting three people from each state. Seventy-five of the people surveyed have a college degree. Based on the survey, Susie concluded that 50% of the people in the United States have a college degree. Select the statement that is true about Susie's conclusion. A. Susie's conclusion is valid because the sample was random. B. Susie's conclusion is not valid because the sample was biased since all the people were from one state. C. Susie's conclusion is not valid because the sample was random. D. Susie's conclusion is valid because the sample was biased since all the people were from one state.

Answer 1

The answer is A.

B is incorrect because she selected 3 from each state, not 150 all from one state.

C is incorrect because random sampling is good.  It helps eliminate group biases in polling.  C suggests that random sampling is a bad thing.

D is incorrect becasue once again, she selected 3 from each state, not 150 from one state.