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[PS] Expected value done, Variance start
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@@ -5,6 +5,7 @@
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\subsubsection{Beispiele}
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% TODO: Consider if need derivation of them here and prev section as well
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% TODO: Also add the ones proven in exercises
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\shortlemma[Int über gauss. Glockenk.] $\int_{-\8}^{\8} e^{\frac{-x^2}{2\sigma^2}} \dx x = \sqrt{2 \pi \sigma^2}$
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\begin{itemize}
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\item $\cX \sim \cU([a, b])$, $a < b$: $\E[\cX] = \frac{a + b}{2}$
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