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If x(1),x(2)……..x(n) be n observation an...

If `x_(1),x_(2)……..x_(n)` be n observation and `barx` be their arithmetic mean .Then formula of the standard deviation is given by

A

`Sigma(x_(i)-xbar)^(2))`

B

`(Sigma(x_(i)-barx)^(2))/n`

C

`sqrt((Sigma(x_(i)-barx)^(2))/n)`

D

`sqrt((Sigmax^(2)i)/n+barx^-2)`

Text Solution

Verified by Experts

The correct Answer is:
C
SD is given
`sqrt((Sigma(x_(i)-barx)^(2))/n)`
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