What is the typical sample size used for pretesting a survey instrument?
A. 10-20
B. 20-30
C. 50-100
D. 100-200
E. 200-500
Answer: B
What is the typical sample size used for pretesting a survey instrument?
A. 10-20
B. 20-30
C. 50-100
D. 100-200
E. 200-500
Answer: B