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Essential Statistics for Non-STEM Data Analysts
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The previous section introduced an example of misleading sampling in political polling. The correctness of a sampling approach will change depending on its content. When telephones were not accessible, polling by phone was a bad practice. However, now everyone has a phone number associated with them and, in general, the phone number is largely random. If a polling agency generates a random phone number and makes calls, the bias is likely to be small. You should keep in mind that the standard of judging a sampling method as right or wrong should always depend on the scenario.
There are two major ways of sampling: probability sampling and non-probability sampling. Refer to the following details: