Mention six sources of errors in surveys.

1. Sampling error: This occurs when the sample selected for the survey is not representative of the population being studied, leading to biased results.

2. Non-response error: This occurs when a significant portion of the selected sample does not respond to the survey, leading to a potential bias in the results.

3. Measurement error: This occurs when the questions asked in the survey are unclear, leading to inaccurate responses from participants.

4. Coverage error: This occurs when certain groups within the population are not included in the survey, leading to a lack of representation and potential bias in the results.

5. Response bias: This occurs when participants in the survey provide inaccurate or dishonest responses, either intentionally or unintentionally.

6. Processing error: This occurs when errors are made during the data collection, entry, or analysis process, leading to inaccurate results.

1. Sampling Errors
2. Response Errors
3. Measurement Errors
4. Nonresponse Errors
5. Interviewer Errors
6. Processing Errors