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AP EAMCET Engineering 2016 Code C Paper
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© examsnet.com
Question : 9
Total: 160
If the mean of 10 observations is 50 and the sum of the squares of the deviations of the observations from the mean is 250 , then the coefficient of variation of those observations is
25
50
10
5
Validate
Solution:
−
x
=
∑
x
i
10
=
50
,
∑
|
x
i
−
−
x
|
2
=
250
,
σ
2
=
1
10
∑
|
x
i
−
−
x
|
2
=
25
C
.
V
(
x
)
=
σ
−
x
×
100
=
5
50
×
100
=
10
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