Which of the following best summarizes "nonresponse bias"?
A. The tendency for samples to differ from the corresponding population as a result of systematic exclusion of some part of the population.
B. A tendency for samples to differ from the corresponding population because data are not obtained from all individuals selected for inclusion in the sample.
C. The tendency for samples to differ from the corresponding population because the method of observation tends to produce values that differ from the Answer: True value.
D. A bias on the part of the researcher towards those who choose not to participate in a survey.
E. None of these describes nonresponse bias.
Answer: B