## Related questions with answers

The computer giant IBM has 329,373 employees and 637,133 stockholders. A vice president plans to conduct a survey to study the number of shares held by individual stockholders.

c. If the survey is conducted by telephoning 20 randomly selected stockholders in each of the 50 United States, what type of sampling (random, systematic, convenience, stratified, cluster) is being used?

Solution

VerifiedSimple random sampling uses a sample in which every individual has an equal chance of being chosen.

Stratified random sampling draws simple random samples from independent subgroups.

Cluster sampling divides the population into non-overlapping subgroups and some of these subgroups are then in the sample.

Systematic sampling is letting every $k$th individual be in the sample ($k$ an integer).

Convenience sampling uses for example voluntary response or a subgroup from the population (that is conveniently chosen).

Stratified

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