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mLine 7:
Line 7: − − For a discretely distributed variable <math>X</math> with [[probability mass function]] − <math>p_{k}</math> it is − :<math> − \mbox{E}[X] = \sum_{k} p_{k}x_{k} − </math> − − Line 23:
Line 15: + + + + + +
no edit summary
f(x)dx.
f(x)dx.
</math>
</math>
The expectation is also the [[mean]] of a distributed variable <math>X</math>.
The expectation is also the [[mean]] of a distributed variable <math>X</math>.
g(x)
g(x)
f(x)dx.
f(x)dx.
</math>
For a discretely distributed variable <math>X</math> with [[probability mass function]]
<math>p_{k}</math> it is
:<math>
\mbox{E}[X]=\sum_{k} p_{k}x_{k}.
</math>
</math>
[[category:Probability and Statistics]]
[[category:Probability and Statistics]]