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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

3

B

9

C

4

D

2

Text Solution

AI Generated Solution

To find the standard deviation of the 9 items \( x_1, x_2, \ldots, x_9 \) given the conditions: 1. \( \sum_{i=1}^{9} (x_i - 5) = 9 \) 2. \( \sum_{i=1}^{9} (x_i - 5)^2 = 45 \) We can follow these steps: ### Step 1: Understand the given information ...
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