Short Answer
When the people who answer a mail survey are different in important ways (e.g.income level)from the people who did not answer the survey,the survey is said to have ____________________ error.
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q70: One research firm uses successive samples the
Q71: Which of the following is a type
Q72: People who are unwilling to participate in
Q73: A person who is not at home
Q74: Nonresponse is a type of respondent error.
Q75: Some aspects of surveys may be qualitative.
Q76: People who are not contacted or who
Q77: When a hotel customer decides to fill
Q79: The purpose of survey research is to
Q80: The number of "no contacts" in survey