What potential sources of error might be associated with the following situations? a. In a survey of frequent fliers ages 50 and older, researchers concluded that price does not play a significant role in airline travel because only 25% of the respondents check off price as the most important consideration in determining where and how they travel, while 35% rated price as unimportant.
b. A survey of voters finds that most respondents do not like negative political ads—that is, advertising by one political candidate that criticizes or exposes secrets about the opponent’s "dirty laundry."
c. A survey of MySpace users ranks Macbooks as far superior to other PCs for business applications.
d. Researchers who must conduct a 45-minute personal interview offer $100 to each respondent because they believe that people who will sell their opinions are more typical than someone who will talk to a stranger for 45 minutes.
e. A company’s sales representatives are asked what percentage of the time they spend making presentations to prospects, traveling, talking on the telephone, participating in meetings, working on the computer, and engaging in other on-the-job activities.
f. A health insurance company obtains a 75 percent response rate from a sample of college students contacted by mobile phone in a study of attitudes toward life insurance.