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If the S.D. of n observations x1,x2,x3.....

If the S.D. of n observations `x_1,x_2,x_3.......x_n` is 4.and another set of n observations `y_1,y_2.y_3......y_n` ,is 3 the S.D. of n observations `x_1-y_1,x_2-y_2,x_3-y_3......................x_n-y_n` is

A

1

B

`2sqrt3`

C

` 5`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
D
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