Question

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)`

Answer 1

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