Which of the following is not recommended for prompting returns of mailed questionnaires?

Which of the following is not recommended for prompting returns of mailed questionnaires?
 
  a. Include a cover letter explaining the purpose of the study
  b. Ask questions the respondent will view as being significant.
  c. Select respondents who are not personally involved in the matter being surveyed.
  d. Request the questionnaire be returned by a particular date.

Ques. 2

Given a sample of those who did not respond to a mailed questionnaire, the main purpose for interviewing the sample is to
 
  a. increase the size of the sample.
  b. attempt to change the results that the investigator did not like.
  c. discover which items were unclear to the subjects.
  d. determine whether non-respondents differ from respondents.
  e. determine what the non-respondents think about the questionnaire.

Ques. 3

To obtain data in a survey, a mailed questionnaire has been used. Would you advise the researcher to follow up some of those in the sample who failed to respond to the questionnaire?
 
  a. Yes, a large sample will avoid bias.
  b. Yes, the respondents may differ from non-respondents.
  c. No, delayed returns would be of doubtful value.
  d. No, a certain loss of respondents is expected.

Ques. 4

The most serious problem associated with the use of a mailed questionnaire in research is
 
  a. formulating the questions.
  c. selecting the sample.
  b. obtaining the responses.
  d. analyzing the data.

Ques. 5

As compared with the open-ended format, which of the following represents an obvious disadvantage of the closed question format on a questionnaire?
 
  a. difficult to code and analyze
  b. more time consuming tom complete
  c. provide more insight into the level of respondent understanding of an issue
  d. restrict the range of responses

Ques. 6

An advantage of the open-ended question format over closed questions in an interview is that the open-ended questions
 
  a. generally take less time to complete.
  b. yield data that are easier to code and analyze.
  c. are more effective in focusing the subject's mind on the questions at hand.
  d. give subjects a chance to reveal the frame of reference for their responses.