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Let x(i) (1 le I le 10) be ten observ...

Let `x_(i) (1 le I le 10)` be ten observation of a random variable X. If `underset(i=l)overset(10)sum(x_(i) - p) = 3 ` and `underset(i=l)overset(10)sum(x_(i) - p)^(2) = 9` where ` 0 ne p in R `,then the standard deviation of these observations is :

A

`(9)/(10)`

B

`(4)/(5)`

C

`(7)/(10)`

D

`sqrt((3)/(5))`

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