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Identify the sampling techniques used, and discuss potential sources of bias (if any). Explaln. In 1965, researchers used random digit dialing to call 1500 people and ask what obstacles kept them from exercising. What type of sampling was used? O A. Convenience sampling was used, since the 1500 phone numbers that were easiest to reach were 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. O D. 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. What potential sources of bias were present, if any? Select all that apply. O A. No one talks honestly about their exercising habits with people they do not know because it is too personal a subject. This may have led to untrue responses to the survey question. O B. Telephone sampling only 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 pop Oc. Individuals may have not been available when the researchers were calling. Those individuals that were available may have not been representative of the population. D. Individuals may have refused to participate in the sample. This may have made the sample less representative of the population. O E. There were no potential sources of bias.

Identify the sampling techniques used, and discuss potential sources of bias (if any). Explaln. In 1965, researchers used random digit dialing to call 1500 people and ask what obstacles kept them from exercising. What type of sampling was used? O A. Convenience sampling was used, since the 1500 phone numbers that were easiest to reach were 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. O D. 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. What potential sources of bias were present, if any? Select all that apply. O A. No one talks honestly about their exercising habits with people they do not know because it is too personal a subject. This may have led to untrue responses to the survey question. O B. Telephone sampling only 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 pop Oc. Individuals may have not been available when the researchers were calling. Those individuals that were available may have not been representative of the population. D. Individuals may have refused to participate in the sample. This may have made the sample less representative of the population. O E. There were no potential sources of bias.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 exercising. What type of sampling was used? O A. Convenience sampling was used, since the 1500 phone numbers that were easiest to reach were 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. O D. 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. What potential sources of bias were present, if any? Select all that apply. O A. No one talks honestly about their exercising habits with people they do not know because it is too personal a subject. This may have led to untrue responses to the survey question. O B. Telephone sampling only 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. O C. Individuals may have not been available when the researchers were calling. Those individuals that were available may have not been representative of the population. O D. Individuals may have refused to participate in the sample. This may have made the sample less representative of the population. O E. There were no potential sources of bias.
Transcribed Image Text: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 exercising. What type of sampling was used? O A. Convenience sampling was used, since the 1500 phone numbers that were easiest to reach were 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. O D. 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. What potential sources of bias were present, if any? Select all that apply. O A. No one talks honestly about their exercising habits with people they do not know because it is too personal a subject. This may have led to untrue responses to the survey question. O B. Telephone sampling only 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. O C. Individuals may have not been available when the researchers were calling. Those individuals that were available may have not been representative of the population. O D. Individuals may have refused to participate in the sample. This may have made the sample less representative of the population. O E. There were no potential sources of bias.
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