__________ produces random sampling error, whereas __________ is a source of sample bias.
A) An incomplete sampling frame; refusals to cooperate
B) Random selection; failures to contact sampled respondents
C) Refusals to cooperate; an incomplete sampling frame
D) Failures to contact sampled respondents; random selection

Question

Quizplus · Accepted Answer

Random selection produces random sampling error because it involves chance variations in selecting a sample. Failures to contact sampled respondents can lead to sample bias because certain groups may be systematically underrepresented if they are harder to reach.

__________ Produces Random Sampling Error, Whereas __________ Is a Source

Produces Random Sampling Error, Whereas Is a Source