A market research firm has a pool of potential research cand…
A market research firm has a pool of potential research candidates that they send surveys to when a new study is coming up. The firm is preparing to conduct research for a manufacturer of dishwasher detergent. The survey the research firm sends out to identify participants asks respondents to indicate the number of loads they run per week, what type of detergent they currently use, if they are loyal to a particular brand, among other questions. The manufacturer wants the research firm to choose respondents that have characteristics that are about the same as the proportion of people in the target population. They should use a ____.