Question

Investigators selected an SRS of 200 high school seniors from a population of 2000 for a survey of television-viewing habits, with an overall response rate of 75%. By checking school records, they were able to find the grade point average for the nonrespondents, and classify the sample accordingly:

Answer 1

They were able to find the grade point averaga for the nonrespondents, and classify the sample by the average result of the survey conducted with 10% of the population. The grade achieved corresponded to 75% of the ranking, exceeding the average.

Explanation:

200 represents 10% of the 2000 population, doing the research and averaging the answers given by the 200 people yielded the final result.