For the following report, identify a) the population; b) the population parameter of interest, c) the sampling frame, d) the sample, e) the sampling method, including whether or not randomization was employed f) any potential sources of bias you can detect and any problems you see in generalizing to the population of interest. Researchers waited outside a car dealership they had randomly selected from a list of such establishments. They stopped every 20th person who came out of the dealership and asked whether he or she tho pollution was a serious problem. a) Identify the population. O A. Every 20th person leaving the dealership O B. Car dealership customers of this particular establishment O C. All people that go to car dealerships O D. All people except those who work at car dealerships b) The population parameter of interest O A. Proportion of people who did not answer the survey O B. Proportion who think pollution is not a serious problem O C. Proportion of people who answered the survey O D. Proportion of people who think pollution is a serious problem c) The sampling frame O A. People who think pollution is a problem O B. Car dealership customers of this particular establishment O C. All people except those who work at car dealerships O D. Every 20th person leaving the dealership d) The sampleFor the following report, identify a) the population, b) the population parameter of interest, c) the sampling frame, d) the sample, e) the sampling method, including whether or not randomization was em f) any potential sources of bias you can detect and any problems you see in generalizing to the population of interest. Researchers waited outside a car dealership they had randomly selected from a list of such establishments. They stopped every 20th person who came out of the dealership and asked whether he or s pollution was a serious problem. U U. Every zuull person leaving the dealership d) The sample O A. Every 20th person leaving the dealership O B. People O C. Every person leaving the dealership O D. All people except those who work at car dealerships e) The sampling method, including whether or not randomization was employed O A. Not specified, but at least "random" O B. Questionnaire (non-random) O C. Systematic sampling O D. Not specified, non-random f) Any potential sources of bias you can detect and any problems you see in generalizing to the population of interest O A. Nonresponse bias is possible. Since some people leaving the dealership may not respond to the interview, the study may misrepresent the general population. O B. Undercoverage bias is possible. Since those interviewed just left a car dealership, their opinions about pollution may differ from the population in general. O C. Response bias is possible. The study is conducted in such a way as to achieve a desired response that may be different from the population in general. O D. There is no indication of bias