A researcher wants to determine what percentage of the population in southern Ontario would use a mass transit system if it were well maintained. He gets telephone books from every city with over 200,000 people in the province and selects the fifteenth name in the middle column on every hundredth page as his sample. Which type of error has he made?

Question

Quizplus · Accepted Answer

The researcher has made a frame error by only selecting individuals from telephone books. This excludes individuals who do not have a listed phone number or those who live in households without a phone. Therefore, the sample may not be representative of the entire population in southern Ontario, leading to potential biases in the results.

A Researcher Wants to Determine What Percentage of the Population