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BITSAT 2012 Solved Question Paper
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© examsnet.com
Question : 96
Total: 150
If sample A contains 100 observations 101, 102, .... 200 and sample B contains 100 obsections 151, 152, .......... 250, then ratio of variance
v
A
∕
v
B
=
1
9
4
4
9
2
3
Validate
Solution:
Since
δ
x
2
=
d
2
i
n
But both A and B have 100 observations, then both the sample A and B have same standard deviation and the same variance.
Hence,
V
A
V
B
= 1
© examsnet.com
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