With respect to the sampling plan, three decisions must be made:
(1) the sampling unit—who is to be surveyed;
(2) sample size—how many people should be surveyed; and
(3) ________.
A) sample cost—how much does sampling cost
B) surveyor skill—who should conduct the survey
C) sample security—how should the sample data be protected
D) sampling procedure—how should respondents be chosen
E) sample supervisor—who leads the sampling effort
Answer: D