Random-digit dialing in telephone surveys serves to
A) increase response rates.
B) increase sample quality by reaching respondents with unlisted numbers.
C) decrease the cost of telephone surveys by reducing dialing time.
D) increase sample size.

Question

Quizplus · Accepted Answer

Random-digit dialing increases sample quality by reaching respondents with unlisted numbers, who may have different characteristics than those with listed numbers. It may not necessarily increase response rates or sample sizes, and may even increase the cost of telephone surveys by requiring more dialing time to reach valid numbers.

Random-Digit Dialing in Telephone Surveys Serves to