USES OF TABLES & CHARTS

Teacher: Ibironke Sonuga

Ibironke Sonuga 2

Define Tables Enumerate the characteristics of a good

table Explain the importance of tables Construct a pie chart from a given data Construct a simple, component and

multiple bar chart from a given data Construct a line graph from a given

data Choose an appropriate chart to use for

different data

Lesson objectives

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Tables and charts, are frequently used to visually communicate data

The goal in creating tables, charts or graphs is to present data in a clear and accurate format which is easily interpreted.

Introduction

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A table is an orderly presentation of data using rows and columns.

Tables

Names Class Age hobbiesShade 7 10 ReadingFemi 8 12 SwimmingObi 7 11 WritingSule 7 10 SwimmingAda 9 12 ReadingGomwok 8 11 swimming

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It must have a title

The sub-heading of the columns and rows must be stated

The units of measurement used in the table must be stated

The source of information should be stated Number your tables

It must be easy to understand. Organize your tables neatly so that the meaning of the table is obvious at first glance

Characteristics of Good Tables

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It explains more information in less time than pages of an explanatory essay

Makes comparison easier

Highlights the important information

Easier and faster decision making

Importance of Good Tables

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A diagram that shows functional relationship between two variables

Graphs are used in economics and statistics for analysis. Examples are: Pictogram Pie charts Bar chart: single bar chart, multiple bar

chart, component bar chart. Histogram Line graph

Graphs

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These are charts in which pictures or drawing of objects are used to represent data

Pictogram

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Pictogram

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This is a circle divided into sectors, each sector representing the relative size of different variables of the population or objects

Pie Chart

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How to construct a pie chart: Add up total figures Calculate the angle of each sector Draw a circle of convenient size Divide the circle into sectors

using the angles calculated above Write the degree of each sector in

in it. Don’t forget your title

Pie Chart

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This is a representation of data by scaled lengths of bars. These bars are equal in width, and the lengths are proportional to the quantities they represent. The body of the bars must not touch each other.

There are:

Bar Chart

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Simple Bar Charts – One variable in. The bars are of equal widths and lengths proportional to the values they represent in the data

Bar Chart

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Component Bar Charts – each bar is divided into two or more sections, proportional in size to the component parts of a total being displayed by each bar

Bar Chart

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Multiple Bar Charts – component values are drawn as different bars adjoining each other.

Bar Chart

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The histogram is similar to the simple bar chart but the bars are connected together. There are no spaces between them.

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Histogram

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Line Graph

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The line graphs make use of lines for data representation.

The line graphs are very useful in economics.

Examples are the demand and supply curve, costs curve, etc.

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sP

Q

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Define Tables Enumerate the characteristics of a good table Explain the importance of tables Construct a pie chart from a given data Construct a simple, component and multiple

bar chart from a given data Construct a line graph from a given data Choose an appropriate chart to use for

different data

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Can you now….