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2.1.11 - (2.1.11 Survey Research(3 Response Rate Response...

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(2.1.11) Survey Research (3) Response Rate Response Rate: The number of completed surveys divided by the number eligible/valid in the sample Number completed the survey/number eligible or valid in sample EX: Completed: 150, eligible/valid: 300 o Response rate: 50% o Non-response rate: 50% To obtain response rate, divide number of responders by total valid sample: o 550/800= 68.8% To obtain non response rate divide number of non-responders in valid sample by total valid sample: o 250/80= 31.3% Non-response error Non-response error: If there is a large difference between those who respond and those who don’t, the results may not be true descriptions of population ( lack of representativeness) Sources of non-response errors: o Refusal: decline to participate/refuse to answer any questions o Incomplete: fail to complete a survey once it has begun (answer only some parts) o Not at home: respondent is unavailable at the time of potential contact Reduce non-responses: o Use advance notification o
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