Improving response rate -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. 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.

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

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

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

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 .

We need to find that two of the treatments .

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.