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Standard XII
Mathematics
Coefficient of Variation
If mean of a ...
Question
If mean of a series is 40 and variance 1486, then coefficient of variation is
A
0.9021
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B
0.9637
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C
0.8864
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D
0.9853
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Solution
The correct option is
C
0.9637
If mean of the given dist. be
¯
x
and S.D be
σ
then given
¯
x
=
40
,
σ
2
=
1486
∴
Coefficient of variation
=
σ
¯
x
=
√
1486
40
=
.9637
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