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Mittelwerte

$\displaystyle \bar{x}_\mathrm{med} =\begin{cases}x_{(\frac{n+1}{2})}, & n\text{... ..._{({\frac n2})} + x_{({\frac n2+1})}\right), & n \text{ gerade.} \end{cases} $

\begin{displaymath} \begin{array}{lcrcl} \text{Mittelwert} & \text{Zwei Zahlen... ...t {{x_1^2 + x_2^2 + \cdots + x_n^2} \over n} \\ \end{array} \end{displaymath}