the owner of a car dealership planned to develop strategies to increase sales. he hoped to learn the reasons why many people who visit his car lot do not eventually buy a car from him. for one month he asked his sales staff to keep a list of the names and addresses of everyone who came in to test drive a car. at the end of the month he sent surveys to the people who did not buy the car, asking them why. about one third of them returned the survey, with 44% of those indicating that they found a lower price elsewhere. which is true? i. the population of interest is all potential car buyers. ii. the survey design suffered from non-response bias iii. because it comes from a sample, 44% is a parameter, not a statistic