You are reading a study about the relationship between years of heroin use and risk of future overdose. You notice that the researchers randomly selected their sample in a tertiary care emergency room but did not exclude those who were there for treatment for overdose. You are concerned that recruiting at a site that treats patients who have overdosed may overestimate the risk of overdose with this sampling methodology. This could be an example of:
A) sampling bias
B) sampling error
C) increased specificity
D) increased sensitivity

Question

Quizplus · Accepted Answer

Sampling bias occurs when the sample is not representative of the population, which can happen if the sample is drawn from a specific subgroup, such as patients who have already overdosed, leading to an overestimation of the risk of overdose.

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