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Mathematics Marks

Tens digit Stem Leaf Units digit Stem Leaf
3 2 3 2 Rearrange
4 Repeat the 4 the digits
Write the same digits
digits on the 5 6 8 2 0 0 9 for the 5 0 0 2 6 8 9 on the ‘leaf’
‘stem’ from 6 0 9 3 4 7 3 9 same data. 6 0 3 3 4 7 9 9 from the
the least to 7 1 5 8 7 7 1 5 7 8 least to the
the greatest. 8 6 2 8 2 6 greatest.

Key: 3 | 2 means 32 marks.

This stem-and-leaf plot is suitable for displaying the marks
of each student in the class.
Discuss whether the
stem-and-leaf plot is
suitable for
Open the folder downloaded from page vii to open the file Bar • displaying large data
Chart.xls for the data representation in Example 3. Hence, continue • representing
your exploration with other types of data representation. categorical data or
numerical data

Self Practice 12.1b

1. A survey was carried out in a class to find out how the students travel to school, and
the results are as shown in the table below. Construct a bar chart to represent the data
and justify the appropriateness of the data representation.

Transportation Car School bus Public bus Bicycle Walk
Frequency 8 10 7 2 5

2. The table shows the prices of four types of accommodation around the Historical
City of Melaka at normal rate and during holiday season. Construct a bar chart
to represent the two sets of data and justify the appropriateness of the data
representation.

Type of accommodation Hotel Homestay Budget hotel Hostel
Normal rate (RM) 300 250 150 100
Holiday season (RM) 350 300 200 100
CHAPTER
12 3. The table shows the favourite songs of a group of children.

Geylang Lompat
Favourite Rasa Ikan Bangau Oh Dayung
song Sayang Kekek Bangau Si Paku Si Katak Sampan
Geylang Lompat
Number of 30 40 20 15 10 5
children
Construct a pie chart to represent the data and justify the appropriateness of the data
representation.

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Chapter 12

12 TB Math F1.indd 274 11/10/16 12:21 PM