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Learn why a foundational component of surveys is demographic questions, which enable you to understand the nature and characteristics of your respondents Inside this Article... Introduction The significance of demographic questions...
Is the sample qualified?
Do members selected in this sample frame match the qualifications for the study target population? (is this qualified list of members a sample representative of a total population)
How do you ensure subgroups are represented?
How how do I avoid excluding subgroup subjects from the sampling frame? (selection bias), and properly use quotas to ensure all subgroup individuals are represented? (non-response bias).
How accurate are the results?
With what degree of precision (margin of error) can I forecast or state my conclusions? This sampling error is about the statistical accuracy of estimates from the target population, confidence interval, and sample size.