Question

For a set of 9 numbers, (x - 2)^2 = 234. Find
the standard deviation of the numbers.​

Answer 1

ANSWER

Mean (μ)=

50

∑x

i

=16

standard deviation (σ)=

50

∑x

i

2

−(μ)

2

=16⇒(256)×2=

50

∑x

i

2

New mean

=

50

∑(x

i

−4)

2

=

50

∑x

i

2

+16×50−8∑x

i

=(256)×2=16−8×16=400

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