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Random Variables
easy
0:00.0
If
X
X
X
has
E
[
X
]
=
2
E[X] = 2
E
[
X
]
=
2
and
E
[
X
2
]
=
8
E[X^2] = 8
E
[
X
2
]
=
8
, what is
V
a
r
(
X
)
Var(X)
V
a
r
(
X
)
?
A
2
B
3
C
4
D
6
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