Random Error
Random error refers to the fact that any survey measure taken over and over again may well be different (by some small amount) upon each measure, merely due to chance measurement imprecision. Thus, compared to the true value of the measure for a given respondent, the observed value will be on the high side some of the time and on the low side other times. This deviation of the observed value from the true value often is signified by e in the following formula:
X=T + e,
where X is the observed value and T is the true value. In theory, over many similar measures of the same variable taken from the same respondent, the average of the observed values will equal the true value. That is, ...
Looks like you do not have access to this content.
Reader's Guide
Ethical Issues In Survey Research
Measurement - Interviewer
Measurement - Mode
Measurement - Questionnaire
Measurement - Respondent
Measurement - Miscellaneous
Nonresponse - Item-Level
Nonresponse - Outcome Codes And Rates
Nonresponse - Unit-Level
Operations - General
Operations - In-Person Surveys
Operations - Interviewer-Administered Surveys
Operations - Mall Surveys
Operations - Telephone Surveys
Political And Election Polling
Public Opinion
Sampling, Coverage, And Weighting
Survey Industry
Survey Statistics
- All
- A
- B
- C
- D
- E
- F
- G
- H
- I
- J
- K
- L
- M
- N
- O
- P
- Q
- R
- S
- T
- U
- V
- W
- X
- Y
- Z