Page 11 - TOP CLASS MATHS T5 KSSM

Mathematics Form 5 Chapter 7 Measures of Dispersion for Grouped Data

(a) Cumulative
Time (minutes) Frequency Lower boundary Upper boundary frequency
Masa (minit) Kekerapan Sempadan bawah Sempadan atas
Kekerapan longgokan
2.1 – 3.0 5 2.05 3.05 5

3.1 – 4.0 8 3.05 4.05 13

4.1 – 5.0 12 4.05 5.05 25

5.1 – 6.0 13 5.05 6.05 38

6.1 – 7.0 9 6.05 7.05 47
7.1 – 8.0 3 7.05 8.05 50

Histogram: Cumulative histogram:
Histogram longgokan:

Frequency
Kekerapan

14
Cumulative frequency
12 Kekerapan longgokan

10 50

8 40

6 30
4 20

2 10

0 0
2.05 3.05 4.05 5.05 6.05 7.05 8.05 2.05 3.05 4.05 5.05 6.05 7.05 8.05
Time (minutes) Time (minutes)
Masa (minit) Masa (minit)

(b) Marks Frequency Lower boundary Upper boundary Cumulative frequency
Markah Kekerapan Sempadan bawah Sempadan atas Kekerapan longgokan

20 – 29 5 19.5 29.5 5

30 – 39 9 29.5 39.5 14

40 – 49 14 39.5 49.5 28
50 – 59 8 49.5 59.5 36

60 – 69 6 59.5 69.5 42

70 – 79 3 69.5 79.5 45

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