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The management of ‘Fun Land’ studied the waiting times for Dogging Car by children in waiting area before sit and drive a car. The following data with waiting times in minutes were collected over a one-month period. Consider the following data in Table 2.1:

Table 2.1

28 17 30 25 22

33 38 23 26 10

14 15 24 22 34

12 33 32 31 26

26 32 35 17 12

34 32 22 19 14

15 27 15 25 31

36 28 35 28 22

26 10 29 19 15

9 20 34 27 20

a) Develop a frequency distribution using classes of 9–14, 15–20, 21–26, 27–32, and 33–38. [1]

b) Develop a relative frequency distribution and a percent frequency distribution. [2]

c) Cumulative frequency and a cumulative relative frequency. [2]