Which of the following statements about sampling is incorrect? А. systematic exclusion of certain groups from consideration for the sample. В. Selection bias refers to a Sampling bias is defined as...

R4

Extracted text: Which of the following statements about sampling is incorrect? А. systematic exclusion of certain groups from consideration for the sample. В. Selection bias refers to a Sampling bias is defined as the researchers' tendency to interpret statistical results that fit their preferred outcome. C. An estimator is biased if the sample statistic systematically underestimates or overestimates a population parameter. D. Sampling error is the difference between the sample mean (X) and the population mean (u).