Jawaban :

Diketahui :

Data 4, 5, 6, 6, 6, 7, 7, 8, 9

a. Rata-rata?...

Rata-rata = Jumlah nilai data/jumlah data

Rata-rata = 4 + 5 + 6 + 6 + 6 + 7 + 7 + 8 + 9/9

Rata-rata = 58/9

Rata-rata = 6,44...

b. Modus?...

4 = 1

5 = 1

6 = 3

7 = 2

8 = 1

9 = 1

Maka, modusnya = 6

c. Median/kuartil tengah (Q2) ?...

4, 5, 6, 6, 6, 7, 7, 8, 9

Median = 6

d. Kuartil atas (Q1) ?...

4, 5, 6, 6

Q1 = 5 + 6/2

Q1 = 11/2

Q1 = 5,5

e. Kuartil bawah (Q3) ?...

7, 7, 8, 9

Q3 = 7 + 8/2

Q3 = 15/2

Q3 = 7,5

f. Jangkauan data/range?...

Range = Xmax - Xmin

Range = 9 - 4

Range = 5

g. Jangkuan interkuatil (hamparan/rentang antar kuartil) ?...

H = Q3 - Q1

H = 7,5 - 5,5

H = 2

h. Jangkauan semi interkuatil (simpangan kuartil/rataan kuartil) ?...

Qd = 1/2 × (Q3 - Q1)

Qd = 1/2 × 2

Qd = 1