Which of the following items is different when comparing probability sampling and nonprobability sampling?
a. The type of descriptive statistics applied to the sample
b. The size of the sample
c. The relative chance of being selected as a study participant
d. Whether or not the findings can be generalized
ANS: C
Sampling is a process of selecting subjects, events, behaviors, or elements for participation in a study. Random sampling methods usually provide a sample that is representative of a population, because each member of the population has a probability greater than zero of being selected for a study. This is not true of nonrandom sampling methods, in which not every member of the population has an opportunity for selection to the sample. Descriptive statistics applied to the sample are identical. The size of the sample doesn't vary depending on type of sample chosen. Generalization of the findings is possible under either condition.
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