Question

Ragam (varians) , simpangan baku, simpangan kuartil dari data 6,8,6,7,8,7,9,7,7,6,7,8,6,5,8,7 adalah.....

Answer 1

Simpangan baku
x= 6+8+6+7+8+7+9+7+7+6+7+8+6+5+8+7/16
=112/16
=7
s= (6-7)^2+(8-7)^2+(6-7)^2+(7-7)^2+(8-7)^2+(7-7)^2+(9-7)^2+(7-7)^2+(7-7)^2+(6-7)^2+(7-7)^2+(8-7)^2+(6-7)^2+(5-7)^2+(8-7)^2+(7-7)^2/16
=1+1+1+0+1+0+4+0+0+1+0+1+1+4+1+0/16
=16/16
=1
simpangan kuartil
5,6,6,6,6,7,7,7,7,7,7,8,8,8,8,9
Q1=6
Q2=7+7/2
=7
Q3=8
s. kuartil (Qd)= Q3-Q1/2
=8-6/2
= 1