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13.Statistics
normal
If each of given $n$ observations is multiplied by a certain positive number $'k'$, then for new set of observations -
A
variance will be unchanged.
B
new variance will be $k$ times old variance
C
standard deviation will be unchanged.
D
new standard deviation will be $k$ times old standard deviation
Solution
Variance will be multiplied by $k^2$.
$S.D$. will be multiplied by $k$.
Standard 11
Mathematics
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