Mittelwert und Streuung von Stichproben

x1 = x2 = x3 = x4 = x5 =
x6 = x7 = x8 = x9 = x10 =
x11 = x12 = x13 = x14 = x15 =
x16 = x17 = x18 = x19 = x20 =
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