Math miscellaneousHard
Question
Suppose a population A has 100 observations 101, 102, ...., 200, and another population B has 100 observations 151, 152, ...., 250. If VA and VB represent the variances of the two populations, respectively, then
is
is Options
A.1
B.9/4
C.4/9
D.2/3
Solution
. (Here deviations are taken from the mean) Since A and B both has 100 consecutive integers, therefore both have same standard deviation and hence the variance.
∴
= 1 (As Σ d2i is same in both the cases ).Create a free account to view solution
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