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3. Data:
19 20 18 19 15
13 17 15 14 19
16 17 16 18 18
14 13 20 15 20 Banyaknya data (n) = 20
a) Jangkauan
Xmax = 20
Xmin = 13
Jangkauan (R) = Xmax – Xmin
= 20 – 13
= 7
b) Jangkauan Interkuartil
JAK = Q3 – Q1
JAK = 17 – 15
JAK = 2
c) Simpangan Kuartil
1
Q = 17 − 15
d
2
1
Q = 2
d
2
1
Q = 2 = 1
d
2
4. Perhatikan tabel.
Q1 Q2 Q3
Ukuran Sepatu 36 37 38 39 40 41
Frekuensi 22 18 24 14 17 5
Frekuensi Kumulatif (fk) 22 40 64 78 95 100
n = 100
a) Jangkauan
Xmax = 41
Xmin = 36
Jangkauan (R) = 41 – 36
= 5
E-Modul Statistika Kelas VIII SMP Semester 2 (Pembahasan Soal) 28