## Related questions with answers

Identify the type of sampling (random, systematic, convenience, stratified, cluster) used when a sample of the 637,133 stockholders is obtained as described. Then determine whether the sampling scheme is likely to result in a sample that is representative of the population of all 637,133 stockholders.

d. A computer file of all IBM stockholders is compiled so that they are all numbered consecutively, then random numbers generated by the computer are used to select the sample of stockholders.

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).

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