Mathematics, 10.10.2019 20:30 dezmondpowell
Surveys tend to suffer from low response rates. based on past experience, a researcher determines that the typical response rate for an e-mail survey is 30%. she wishes to obtain a sample of 300 respondents, so she e-mails the survey to 2000 randomly selected e-mail addresses. assuming the response rate for her survey is 30%, will the respondents form an unbiased sample? explain. is the sample unbiased?
a. yes. the sample was a randomly selected group of e-mail addresses, which does not introduce bias.
b. no. the survey still suffers from undercoverage (sampling bias), nonresponse bias, and potentially response bias.
c. no. the survey was not given to the entire population.
d. yes. the number of respondents will be approximately 600, that is, two times greater than the needed size of the sample.
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Surveys tend to suffer from low response rates. based on past experience, a researcher determines th...
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