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Mathematics
Problem
State the relationship connecting the variance
σ
2
\sigma^{2}
σ
2
of
n
n
n
observations
x
1
,
x
2
,
…
,
x
n
x_{1},x_{2},\dots ,x_{n}
x
1
,
x
2
,
…
,
x
n
, the arithmetic mean
x
ˉ
\bar{x}
x
ˉ
and the arithmetic mean of the squares of the observations.
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