Which of the following is a main difference between non-probability and probability sampling?
a. Participants are randomly selected in non-probability; participants are not randomly selected in a probability sampling and a sampling frame is never required.
b. Participants are not randomly selected in a non-probability sampling; participants are randomly selected in a probability sampling and a sampling frame is necessary.
c. Participants are randomly selected in both probability and non-probability samplings and a sampling frame is not required.
d. Participants are not randomly selected in either probability or non-probability sampling, a sampling frame is required.
Ans: B
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