Identify the sampling techniques used, and discuss potential sources of bias (if
ID: 3350661 • 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 1100 people and ask what obstacles kept them from saving for retirementsaving for retirement. What type of sampling was used?
A. Cluster sampling was used, since the phone numbers were divided into groups, several groups were selected, and each number in those groups was called.
B. Convenience sampling was used, since the 1100 phone numbers that were easiest to reach were selected.
C. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 1100 phone numbers had an equal chance of being selected.
D. Systematic sampling was used, since phone numbers were selected from a list using a fixed interval between phone numbers.
Explanation / Answer
C. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 1100 phone numbers had an equal chance of being selected.
Because In simple random sampling chances of selection is unbiased and every person getting equal chance of selction that's why we use simple random sampling method .
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