Multiple Choice
Which of these contributes to the nonresponse bias in a telephone survey? Let 1 = no answer;2 = not at home when contacted;3 = disconnected;4 = refused to participate in the study
A) 1,2
B) 1,2,3
C) 3,4
D) 2,4
E) 1,2,3,4
Correct Answer:

Verified
Correct Answer:
Verified
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