Which of the following is a major weakness of a nonprobability sample?
a. Not every element has a known chance of being included in the sample.
b. It is convenient for the sample taker.
c. It allows the selection of members, which are not typical.
d. It is used in small exploratory studies.
e. It is cost efficient.
Question 2
One weakness of a systematic sample is that:
a. it is difficult to separate the population into strata.
b. geographic areas may not be known.
c. taking the sample requires judgment on the part of the researcher.
d. the data may exhibit a pattern of periodicity.
e. the observations are chosen because they are not typical of the population.
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