Mean
cosmos
16th April 2019 at 10:22am
Arithmetic
Harmonic mean
Arithmetic mean
1st moment or
Expectation
of a
Random variable
:
E
[
X
]
=
∑
x
x
P
[
X
=
x
]
E[X] = \sum\limits_x x\mathbb{P}[X=x]
E
[
X
]
=
x
∑
x
P
[
X
=
x
]
Geometric mean
Visual proof that arithmetic mean is larger than geometric mean