Which is the best statement that differentiates between the sizes of samples and populations?
a. A sample has a maximum size; a population does not.
b. A sample cannot be the same size as a population.
c. If a person is a member of a population, he or she is a member of the sample chosen from that population.
d. A population is usually larger than a sample.
ANS: D
The population is all the elements (individuals, objects, or substances) that meet certain criteria for inclusion in a given universe. The researcher must determine which population is accessible and can be best represented by the study sample. A sample is a subset of the population that is selected for a particular study. Being a subset, the sample is either smaller than the population or, very occasionally, equal in size to it; it cannot be larger.
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