Apolitician is interested in the proportion of voters in his district that think he is doing a good job. define the following in terms of the study. give examples where appropriate. (multiple choice)population : a. the population is all voters in the district. b. the population is a group of voters in the district. c. the population is a group of voters in the district who think the politician is doing a good job. d. the population is all the voters in the district who think the politician is doing a good job. sample : a. the sample is a group of voters in the district. b. the sample is all voters in the district. c. the sample is a group of voters in the district who think the politician is doing a good job. d.the sample is all the voters in the district who think the politician is doing a good job. parameter : a. the parameter is the proportion of all voters in the district who think the politician is doing a good job. b. the parameter is the number of registered voters in the district. c. the parameter is the proportion of a group of voters in the district who think the politician is doing a good job. d. the parameter is the number of people in the district. statistic : a. the statistic is the number of voters in the district who think the politician is doing a good job. b. the statistic is the number of registered voters in a group of people. c. the statistic is the proportion of a group of voters in the district who think the politician is doing a good job. d. the statistic is the number of people in the district. variable : a. the variable is the opinion of the registered voters. b. the variable is the political party of the voters. c. the variable is the politician's view of his job. d. the variable is the status of a citizen's voter registration.