Which of the following is true about network sampling?
a. Eligibility criteria do not need to be defined carefully.
b. Finding large numbers of subjects by this means is easy and economical.
c. Sample representativeness is guaranteed by using this technique.
d. Subjects who have knowledge of a situation, often sensitive or not socially acceptable, are identified by others in the same type of situation.
ANS: D
Network sampling is useful for locating samples difficult or impossible to obtain in other ways. Network sampling takes advantage of social networks and the fact that friends tend to have characteristics in common.
In network sampling, the criteria are carefully defined.
Network sampling is a slow process and can get costly.
There is no guarantee of sample representativeness with network sampling.
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