Question

the mean of four observation is 3 if the sum of the squares of these observation is 48 then thier standard deviations ls
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Answer 1

Step-by-step explanation:

We have given, mean

x

ˉ

=3 and ∑x

i

2

=48 and number of observation n=4

Thus standard deviation is, σ=

n

∑x

i

2

−

x

ˉ

2

=

12−9

=

3

Answer 2

Answer:

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