Five hundred persons were chosen to participate in a study, 270 women and 230 men, representative of the proportion of adult women and men in the population of Portland, Oregon. Patients were selected using a table of random numbers, from a master list of all patients who had been treated for congestive heart failure (CHF) in the previous 3 months at one of Portland's four main hospitals. This is an example of what type of sampling strategy?

Question

Quizplus · Accepted Answer

The sampling strategy is stratified random sampling because the researchers divided the population into two strata (women and men) to ensure representation of both groups according to their proportion in the population, and then used random sampling within each stratum.

Five Hundred Persons Were Chosen to Participate in a Study