Imagine you are polling for a statewide referendum. How would you design your sampling strategy? Explain the distinction between 'registered voters' and 'actual participants.' What is the purpose of stratification in your sampling plan?

Define the population as all adults; treat 'registered voters' and 'actual participants' as the same; use simple random sampling.

Define the population as only those who voted in the last referendum; ignore stratification.

Define the population as all state employees; stratify only by job title.

Define the population as registered voters; distinguish 'registered voters' (on the rolls) from 'actual participants' (those who will vote); stratify by region or demographic to ensure representation.