There are three main methods of administering survey questionnaires to a sample of respondents: self-administration, in which respondents are asked to complete the questionnaires themselves; interview administration, in which surveys are administered in face-to-face encounters; and administration by telephone. The most common form of self-administered questionnaire is the mail survey.

Zachary is studying knowledge about local recycling programs. He decides to send out a questionnaire by mail. He sends it out with a letter of explanation and a self-addressed stamped envelope for returning the questionnaire.

Which of the following are things that Zachary could do to increase response rates?Check all that apply.

The researcher can provide incentives to everyone selected in the sample during the first contact.

A research worker could deliver the questionnaire to the homes of sample respondents and explain the study in person.

The researcher could fold the questionnaire so that there is no need for an envelope.

The researcher could include the phone number of the research office on the questionnaire so that respondents could call the office if they misplace the questionnaire.

Which of the following is the definition of response rate?

The proportion of all cases in which a respondent refuses to be interviewed of all potentially eligible cases

The number of people participating in a survey divided by the number selected in the sample, in the form of a percentage

The proportion of all cases in which some responsible housing unit member was reached

The proportion of all cases interviewed of all eligible units ever contacted

A return rate graph is an invaluable tool for monitoring questionnaire returns. The day on which the initial questionnaires were mailed is labeled Day 0 on the graph, and every day thereafter the number of returned questionnaires is logged on the graph in blue.

This graph shows (the number of questionnaires returned each day / cumulative percentage).

What should happen at the time point marked by line A?

The respondents who haven't sent in their questionnaires should be sent a second set.

The respondents should be sent their first set of questionnaires.

The respondents who haven't sent in their questionnaires should be sent a third set.

Serialized ID numbers should be assigned to all the returning questionnaires.