Question

question 10 (1 point)
researchers were interested in determining public opinion on whether drinking and driving was a serious problem. they waited outside a bar they had randomly selected from a list of such establishments. they stopped every 10th adult who came out of the bar and asked whether he or she thought drinking and driving was a serious problem.

identify any potential sources of bias you can detect and any problems you see in generalizing the population.

nonresponse bias is possible. since some adults leaving the bar may not respond to the interview, the study may misrepresent the general population.
bias due to voluntary response sampling is possible. since the respondents select themselves for the survey, their opinions about drinking and driving may differ from the population in general.
there is no indication of bias.
undercoverage bias is possible. since those interviewed just left a bar, their opinions about drinking and driving may differ from the population in general.

Explanation:

1. Analyze each option:

• Option 1 (Nonresponse bias): The study uses a systematic sampling (every 10th adult) outside a bar, not voluntary response. Nonresponse bias isn't the main issue here as the problem is about the sample being unrepresentative of the general population, not non - response.
• Option 2 (Voluntary response bias): The sampling is systematic (every 10th adult), not voluntary response where respondents self - select.
• Option 3 (No bias): This is incorrect because the sample is only from people leaving a bar, which is not representative of the general public.
• Option 4 (Undercoverage bias): The sample consists only of people who left a bar. The general population includes people who don't go to bars, people who don't drink, etc. So, the sample under - represents the general population, and their opinions about drinking and driving (since they are coming out of a bar) may be different from the general population. This is undercoverage bias.

Answer:

D. Undercoverage bias is possible. Since those interviewed just left a bar, their opinions about drinking and driving may differ from the population in general.