A data consists of n observations: x_1,x_2 , ... , x_n. If \sum^{n}_{i=1} (x_i+1)^2 = 9n and \sum^{n}_{i=1} (x_i-1)^2 = 5n , then the standard deviation of this data is : [9 Jan 2019 Shift 2]

JEE Main 9 Jan 2019 Shift 2 Solved Paper

Section: Mathematics

Question : 59 of 90

Marks: +1, -0

A data consists of n observations:
x1,x2 , ... , xn. If

i=1

(xi+1)2 = 9n and

i=1

(xi−1)2 = 5n , then the standard deviation of this data is :

[9 Jan 2019 Shift 2]

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