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Chapter 4: Q. 51 (page 263)

Improving response rate -How can we reduce the rate of refusals in telephone surveys? Most people who answer at all listen to the interviewer鈥檚 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. For each type of call, the interviewer either did or did not offer to send a copy of the final survey results to the person interviewed.

a. List the factors in this experiment and state how many levels each factor has.

b. If the researchers used every possible combination to form the treatments, how many treatments were included in the experiment?

c. List two of the treatments.

Short Answer

Expert verified

a. The factors in this experiment are introductory remarks , opinions about elections ,name and university and response rate .

b. Treatments were included in the experiment six

c. Two of the treatments are opinion about election and offering copy of survey.

Step by step solution

01

Part (a) Step 1: Given information

We need to find that List the factors in this experiment and state how many levels each factor has.

02

 Part (a) Step 2: Explanation

The factors during this experiment are -
The response variable can be defined as that the focus of a question in a study or experiment. An explanatory variable can be defined as one that explains changes therein variable.
Explanatory variables = introductory remarks , opinions about elections ,name and university

Response variables= response rate

03

Part (b) Step 1: Given information

We need to find that the researchers used every possible combination to form the treatments, how many treatments were included in the experiment

04

 Part (b) Step 2: Explanation

In an experiment, the n an experiment, the issue (additionally known as an impartial variable) is an explanatory variable manipulated with the aid of using the experimenter. Each issue has or greater levels, i.e., exceptional values of the issue. Combination of various levels are known as remedies. In this example six remedies had been adopted .

05

Part (c) Step 1: Given information

We need to find that two of the treatments .

06

 Part (c) Step 2: Explanation

The two different treatments are asking opinions about the next election to random person and offering to send a copy of the final survey results to the person interviewed.

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Most popular questions from this chapter

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a. Calculate the difference (Clipboard A 鈥� Clipboard B) in the mean number of days for the two groups. One hundred trials of a simulation were performed to see what differences in means would occur due only to chance variation in the random assignment, assuming that the responses on the clipboard don鈥檛 matter. The results are shown in the dotplot.

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