In a Study Designed to Determine the Incidence of Hypertension

Multiple Choice

In a study designed to determine the incidence of hypertension (high blood pressure) in an inner‐city community, a sample of residents is selected for examination.Which
Of the following sampling methods is likely to lead to the least bias?

A) Residents who respond to a call for volunteers in the community's weekly newspaper
B) Residents living in a random selection of addresses from the community
C) Residents selected from records of the local general practitioner
D) Residents randomly selected from the check‐out lines at the local supermarket
E) Any of the above would be OK