Simpangan kuartil dari data di atas adalah?

data diurut : 3, 4, 5, 5, 7, 10, 14, 15, 18.
Q2 = 7
Q1 = (4+5)/2 = 4,5
Q3 = (14+15)/2 = 14,5
Simpangan kuartil = 1/2(Q3-Q1)
Qd = 1/2(14,5 - 4,5)
Qd = 1/2×10
Qd = 5

data terurut= 3,4,5,5,7,10,14,15,18
Q1=4,5
Q2=7
Q3=14,5
Simpangan Kuartil = 1:2(Q3-Q1)
= 1:2(14,5-4,5)
= 1:2(10)
= 5