Find the variance of 2, 4, 6, 8, 10.
2
4
8
6
As we learned
Short cut Method for Variance -
In case of grouped frequency distribution
- wherein
where
,
and
Variance of 1, 2, 3, 4, 5, is
( variance of first n natural number is when each item is doubled (i.e. 2, 4, 5, 8, 10) variance is multiplied by Required variance
Option 1)
2
Option 2)
4
Option 3)
8
Option 4)
6
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