76 84 68 118 66 68 7666 76 74 76 58 100 6670 80 74 84 140 70 7670 62 56 56 70 74 8066 94 60 116 92 80 84

K = 1+3.32 log (40) = 6.31Diambil 7

K = 7 No Kelas Interval Frekuensin = 40 1 50 - 63 7Max = 140 2 64 - 77 19Min = 50 3 78 - 91 6

4 92- 105 5R = Max- Min 5 106- 119 2 = 140-50 = 90 6 120 - 133 0

7 134-147 1P = R/K = 90/7 = 12.85 Jumlah 40Diambil 13

Biaya yang dikeluarkan seorang mahasiswa membeli pulsa telepon dalam sebulan seperti berikut ( Ribuan)

10094586850

Xi Bb56.5 49.570.5 63.584.5 77.598.5 91.5

112.5 105.5126.5 119.5140.5 133.5

Frekuensi Xi7 56.5

19 70.56 84.55 98.52 112.50 126.51 140.5

49.5 63.5 77.5 91.5 105.5 119.5 133.50

2

4

6

8

10

12

14

16

18

20

Distribusi frekuensi

Distribusi frekuensi

56.5 70.5 84.5 98.5 112.5 126.5 140.502468

101214161820

Xi

Xi

49.5 63.5 77.5 91.5 105.5 119.5 133.50

2

4

6

8

10

12

14

16

18

20

Distribusi frekuensi

Distribusi frekuensi

56.5 70.5 84.5 98.5 112.5 126.5 140.502468

101214161820

Xi

Xi