In a series of observations, half of them equal and remaining half equal . If the standard deviation of the observations is 2, then equals
2
As we learnt in
Standard Deviation -
If x1, x2...xn are n observations then square root of the arithmetic mean of
- wherein
where is mean
Standard deviation =
Here,
N = 2n
Hence standard deviation=
Option 1)
2
Correct
Option 2)
Incorrect
Option 3)
Incorrect
Option 4)
Incorrect
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