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For $a$ series the value of mean deviation is 15. The most likely value of its quartile deviation is
$\begin {array} {1 1} (A)\;12.5 & \quad (B)\;11.6 \\ (C)\;13 & \quad (D)\;9.7 \end {array}$
jeemain
math
cbse
class11
statistics
medium
measures-of-dispersion-(quartile-deviation)
q36
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asked
Jan 27, 2014
by
thanvigandhi_1
retagged
Sep 8, 2014
by
sharmaaparna1
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1 Answer
Since $ MD = \large\frac{4}{5}$ $ \sigma$
$ QD = \large\frac{2}{3}$ $ \sigma$
$ \large\frac{MD}{QD} = \large\frac{6}{5}$
$ \Rightarrow QD = \large\frac{5}{6}$ $ MD$
$ = \large\frac{5}{6} $ $ (15)$
$ = 12.5$
Hence Ans : (A)
answered
Jan 27, 2014
by
thanvigandhi_1
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