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Question

Quartile deviation for a frequency distribution is given by


A
Q=14(Q2Q1)
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B
Q=13(Q3Q1)
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C
Q=12(Q3Q1)
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D
Q=(Q3Q1)
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Solution

The correct option is C $$Q=\cfrac { 1 }{ 2 } (Q_{ 3 }-{ Q }_{ 1 })$$
It is fundamental concept that quartile deviation of any frequency distribution is given by,$$Q = \cfrac{1}{2}(Q_3-Q_1)$$

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