Which type of sampling is most at risk for sample bias?
a. Quota
b. Random
c. Purposive
d. Convenience
ANS: D
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A Quota sampling, if done appropriately, will not create sample bias.
B Random sampling should act to counteract sample bias.
C Purposive sampling would selectively include research subjects and avoid sampling bias.
D Convenience sampling is most at risk for sample bias.
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