Identify the sampling techniques used, and discuss potential sources of bias (if
ID: 3070917 • 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 900 people and ask what obstacles kept them from voting What type of sampling was used? 0 A. Convenience sampling was used since the 900 phone numbers that were easiest to reach were selected O B. Cluster sampling was used, since the phone numbers were divided into groups, several groups were selected, and each number in those groups was called O C. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 900 phone numbers had an equal chance of being selected D Systematic sampling was used since phone numbers were selected rom a list using a fixed interval between phone numbers. What potential sources of bias were present, if any? Select all that apply y includes people who had telephones People who owned telephones may have been older or wealthier on average, and may not have been representative of the entire population A Telephone sampling onl B. The sample only consisted of members of the population that were easy to get These members may have not been representative of the population C Individuals may have refused to participate in the sample This may have made the sample less representative of he population. D. Individuals may have not been available when the researchers were calling Those individuals that were available may have not been representative of the population. E. There were no potential sources of biasExplanation / Answer
Ans:
1)Sampling:
Option C is correct.
Simple random sampling was used,since each member had an equal chance of being dialed,so all samples of 900 phone numbers had an equal chance of being selected.
2)Bias:
Option A is correct.
Telephone sampling only includes people who had telephones.