Measures of Dispersion — Economics STD 11 Commerce — Question
CBSE BoardEnglish MediumSTD 11 CommerceEconomicsMeasures of Dispersion3 Marks
Question
Distinguish between mean deviation and quartile deviation.
✓
Answer
Mean deviation is most widely used measure of dispersion is based on all the values of a series, whereas Quartile Deviation is not based on all the observations, so it is less reliable than the mean deviation.
Mean deviation is not suitable for open-ended classes (as it can not be calculated), whereas Quartile Deviation is the only measure of dispersion which can be used to deal with an open-ended distribution.
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