Write three interview questions on marijuana use to assess the following measures of prevalence:

Question

point prevalence

period prevalence (one-year time period)

lifetime prevalence

Many communities and jurisdictions throughout the United States have legalized recreational use of marijuana. 

Suppose you are asked to conduct a questionnaire study of the prevalence of marijuana use in a community where use of marijuana is legal. 

Answer 1

In my opinion, it is strange to be using the terms point, period, and lifetime prevalence for the study of the legal use of marijuana. These terms are usually used when talking about health risks or diseases. However, here are three example questions you could ask on a questionnaire to get information on these measures:

Point prevalence: Do you use marijuana?

Period prevalence (one-year): If yes, when did you start using marijuana?

Lifetime prevalence: Have you ever used marijuana in your lifetime?

Really period prevalence has more to do with the length of time of the study than the length of time the person has been using. But your question made it sound like you were doing a one time questionnaire, so I tried to make a question that would allow you to kind of look back in time.

I hope this helps. Feel free to reach out to me if you have further questions.