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Distributions
hard
0:00.0
Let
X
∼
N
(
0
,
1
)
X \sim N(0, 1)
X
∼
N
(
0
,
1
)
. Find the expected value of
X
4
X^4
X
4
.
A
3
3
3
B
1
1
1
C
15
15
15
D
0
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