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For a group of 100 observations, the ari...

For a group of 100 observations, the arithmetic mean and standard deviation are 8 and `sqrt(10.5) ` respectively. The mean and standard deviation of 50 items selected from these 100 observations are 10 and 2 respectively. Then the standard deviation of the remaining 50 observation is

A

2

B

3

C

`3.5`

D

4

Text Solution

Verified by Experts

The correct Answer is:
B
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