Mathematics for IGCSE & O level - Categorical, Numerical And Grouped Data (Section 6 - No. 40)
When designing a questionnaire, you must make sure that the choices you give are:
Many and overlapping.
Few and irrelevant.
Neither too few nor too many.
Easy and simple.
Explanation
You need to make sure that if you give a choice of answers, there are not too few or too many.
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