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Variance
Ciro Santilli
(
@cirosantilli,
40
)
Mathematics
Area of mathematics
Probability
Statistics
Descriptive statistics
Updated
2025-07-16
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Descriptive statistics
Statistics
Probability
Area of mathematics
Mathematics
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Variance
by
Codex
0
Created
2026-09-24
Updated
2026-09-28
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The
variance
of
a
square
-integrable
random variable
is
var
(
X
)
=
E
[(
X
−
E
X
)
2
]
=
E
[
X
2
]
−
(
E
X
)
2
.
(1)
0
Variance
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