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Unformatted text preview: Who carried out the survey What was the population How was the sample selected How large was the sample What was the response rate How were the subjects contacted When was the survey conducted What were the exact questions asked 1. Write down a clear statement describing the difference between sampling and non sampling errors Sampling errors are caused by the act of taking a sample. They cause sample results to be different from the results of a census. Non sampling errors are not related to the act of selecting a sample from the population. They can be present even in a census. 1. Some examples of Sampling errors are: Random sampling error Under coverage Bad sampling methods 1. Some Non-sampling errors are: Processing errors Response errors Non response...
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- Spring '10