Page 23 - ULUL AZMI-212010028-3BPMuPM-STATISTIKA

x = σ = 2.970 = 74,25

40

Maka :

k
 ( − x ) 2
2
= = i 1 1

= 5.497,5 = 137,4375
40

S = = 137,4375 = 11,7234
2

Jadi, ragam 137,4375 dan simpanan baku = 11,7234