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If sum(i=1)^9 (xi - 5) = 9 and sum(i=1)...

If `sum_(i=1)^9 (x_i - 5) = 9` and `sum_(i=1)^9 (x_i - 5)^2 = 45.` The standard deviation of the observations `x_1, x_2,………,x_9` is ………….

A

9

B

4

C

2

D

3

Text Solution

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The correct Answer is:
B
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