How can we reduce the rate of refusals in telephone surveys? Most people who ans

Question

How can we reduce the rate of refusals in telephone surveys? Most people who answer at all listen to the interviewer’s introductory remarks and then decide whether to continue. One study made telephone calls to randomly selected households to ask opinions about the next election. In some calls, the interviewer gave her name, in others she identified the university she was representing, and in still others she identified both herself and the university. The study recorded what percent of each group of interviews was completed.

1.) Is this an observational study or an experiment? A) experiment B) both an observational study and an experiment C) neither an experiment nor an observational study D) observational study

2.) What is the explanatory variable? A) the responder’s preference in the next election. B) telephone versus online surveys. C) percent of each group of interviews that was completed. D) how the interviewer introduced herself.

3.) What is the response variable? A) telephone versus online surveys. B) how the interviewer introduced herself. C) the responder’s preference in the next election. D) percent of each group of interviews that was completed.

4.) What is the population of interest in this study? A) the next election. B) the people who get interviewed. C) telephone surveys. D) telephone interviews.

5.) What feature makes this study an experiment? A) the call recipients are chosen at random. B) all of the calls are about the next election. C) the interviewer introduces herself to each group differently. D) there is always another election coming

Explanation / Answer

1) D) observational study

2)  C) percent of each group of interviews that was completed.

3) C) the responder’s preference in the next election.

4) A) the next election

5) C) the interviewer introduces herself to each group differently.

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