Suppose the administration at your school has hired you to help with a survey to find out how students feel about opening a new recreation center on campus. They provide you with a random sample of 100 students and a phone number for each one. Some of them are land-lines, and some are cell phones. You call the 100 numbers and interview the person who answers the phone. Explain which one of the “difficulties and disasters” in sampling you are most likely to encounter and how it could bias your results.
Answer to relevant QuestionsGastwirth (1988, p. 507) describes a court case in which Bristol-Myers was ordered by the Federal Trade Commission to stop advertising that “ twice as many dentists use Ipana [ toothpaste] as any other dentifrice” and ...Each of the following quotes is based on the results of an experiment or an observational study. Explain which was used. If an observational study was used, explain whether an experiment could have been used to study the ...For each of the following observational studies in the news stories in the Appendix, specify the explanatory and response variables. a. News Story 12: “Working nights may increase breast cancer risk.” b. News Story 16: ...Suppose you wanted to know if men or women students spend more money on clothes. You consider two different plans for carrying out an observational study: Plan 1: Ask the participants how much they spent on clothes during ...Find the story referenced as News Story 15 in the Appendix, and consult the original source article on the website, if necessary. One of the results reported was that kids with higher levels of stress in their lives were ...
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