1.

Let x_1, x_2 ,…………,x_n be n observations and barx be their arithmetic mean. The formula for the standard deviation is given by ……….. .

Answer»

`SUM (x_i = BARX)^2`
`(sum(x_i - barx)^2)/(n)`
`sqrt((sum(x_i - barx)^2)/(n)) `
`sqrt((sumx_i^2)/(n)) - (barx)^(-2)`

ANSWER :C


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