Diketahui data : 3,4,5,6,7 tentukan ºsimpangan rata-rata º ragam º simpangan baku

Rata" = (3+4+5+6+7) / 5 = 25/5 = 5

*) Simpangan rata"
SR = ((5-3)+(5-4)+(5-5)+(6-5)+(7-5)) / 5
= (2+1+0+1+2) / 5
= 6/5
= 1,2

*) Ragam
S^2 = ((5-3)^2 +(5-4)^2 +(5-5)^2 +(6-5)^2 +(7-5)^2) / 5
= (2^2 + 1^2 + 0 + 1^2 + 2^2) / 5
= (4+1+0+1+4) / 5
= 10/5
= 2

*) Simpangan baku = √(S^2) = √(2)

Semoga membantu ^.^