If \sum^{18}_{i=1} (x_i - 8) = 9 and \sum^{18}_{i=1} (x_i-8)^2 = 45 then the standard deviation of the observations x_1,x_2,x_3 ... x_{18} is

JEE Mains Model Paper 23

Question : 43 of 90

Marks: +1, -0

i=1

(xi - 8) = 9 and

i=1

(xi−8)2 = 45 then the standard deviation of the observations x1,x2,x3 ... x18 is

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