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Let `x_(1),x_(2),……,x_(n)` be n observations and `barx` be their arithmetic mean. The formula for the standard deviation is

A

`sum(x_(i)-barx)^(2)`

B

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

C

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

D

`sqrt((sumx_(i)^(2))/(n)+barx^(2))`

Text Solution

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The correct Answer is:
C
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