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Measures of Dispersion — Economics STD 11 Commerce — Question

CBSE BoardEnglish MediumSTD 11 CommerceEconomicsMeasures of Dispersion3 Marks
Question
How are quartile deviation, standard deviation and mean deviation related to each other?
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Answer

Relationship between different measures of dispersion:
  1. Mean Deviation= $\frac{4}{5}\ \text{S.D.}$
  2. Quartile Deviation= $\frac{2}{3}\ \text{S.D.}$
  3. Quartile Deviation= $\frac{5}{6}\ \text{S.D.}$

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