Identify the sampling techniques used, and discuss potential sources of bias (if
ID: 3041990 • Letter: I
Question
Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain In 1965, researchers used random digit dialing to call 1500 people and ask what obstacles kept them from sleeping 8 hours a night What type of sampling was used? O A. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 1500 phone numbers had an equal chance of being selected O B. Systematic sampling was used, since phone numbers were selected from a list using a fixed interval between phone numbers O C. Cluster sampling was used, since the phone numbers were divided into groups, several groups were selected, and each number in those groups was called D. Convenience sampling was used, since the 1500 phone numbers that were easiest to reach were selectedExplanation / Answer
The simple random sampling has been used since each number is having equal chance of getting selected.
Option A is correct.
Potential sources of bias: Only the population who is having telephones and the person may not be available when the researcher is calling. Hence, Option A and Option C are correct.