CHAPTER 9

DATA COLLECTION AND PRESENTATION 

Key words: data, chart, pie, quantitative, qualitative, discrete, continuous, hypothesis 

Types of Data 

• Qualitative data is data that is not given numerically; e.g. favourite colour, place of birth, favourite food, and type of car. 

• Quantitative data is numerical. There are two types of quantitative data: discrete and continuous data. Discrete data can only take specific numeric values e. g. shoe size, number of brothers, number of cars in a car park. Continuous data can take any numerical value e.g. height, mass, length.

Activity : Identifying types of data

Identify which of the following terms best describes each of the information listed  (i)  to (vii) ? 

Give reasons for your response.   

Qualitative data • Continuous Quantitative Data • Discrete Quantitative Data 

i) Age ii) Birth place iii) Height iv) World Ranking v) Aces

vi) First serve School vii) School life 

Collecting Data 

In this section, you will see how data is collected, organized and interpreted, using a tally chart and then displayed using:

i) Pictograms 

ii) Bar charts 

iii) Pie charts 

Note: 

A hypothesis is an idea that you want to investigate to see if it is true or false. For example, you might think that most people in your school get there by bus. You could investigate this using a survey. A tally chart can be used to record your data.