5 + 8 + 4 + 1 = 18
Mittelwert = 1·5/18 + 2·8/18 + 3·4/18 + 5·1/18 = 19/9 = 2.111
Mittlere Lineare Abweichung = |1 - 19/9|·5/18 + |2 - 19/9|·8/18 + |3 - 19/9|·4/18 + |5 - 19/9|·1/18 = 58/81 = 0.7160
Varianz = (1 - 19/9)^2·5/18 + (2 - 19/9)^2·8/18 + (3 - 19/9)^2·4/18 + (5 - 19/9)^2·1/18 = 80/81 = 0.9877
Standardabweichung = √(80/81) = 0.9938