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

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

A

9

B

4

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
C
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