Rata rata ni Gimana caranya
Rata rata data = 90 / 9 = 10
simpangan rata rata
= (8-10)+ (10-10)+(9-10)+(10-10)+(11-10)+(10-10)+(11-10)+(10-10) +(11-10)/9
= 2+0+1+0+1+0+1+0+1/9
=6/9
=0,6 A
Rata rata ni Gimana caranya
Rata rata data = 90 / 9 = 10
simpangan rata rata
= (8-10)+ (10-10)+(9-10)+(10-10)+(11-10)+(10-10)+(11-10)+(10-10) +(11-10)/9
= 2+0+1+0+1+0+1+0+1/9
=6/9
=0,6 A