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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
- Statistics, non sampling errors, errors Response errors