Question

A random sample is a sample drawn in such a way that: A. all elements of...

A random sample is a sample drawn in such a way that:

A. all elements of a population are included

B. each member of the population has a .10 chance of being included in the sample

C. each member of the population has some chance of being included in the sample

D. some members of the population have no chance of being included in the sample

Math   Statistics-And-Probability   
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Answer #1

A random sample means that each member in the target population (or universe) has an equal chance of being selected. In probability sampling, it is possible to determine which sampling units belong to which sample and the probability that each sample will be selected. In non-probability Sampling, sample does not have known probability of being selected as in convenience or voluntary response surveys.

The correct choice is (C) -  each member of the population has some chance of being included in the sample.

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