chapter4 statistik.ppt

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In this lesson you will learn how to:

construct a pie chart

During Form 2, you have learnt how to represent data using Bar Chart, Line graph and pictogram . Did you still remember how its look like?

Types of Data PresentationTypes of Data Presentation

Can you name the this diagram?Bar ChartBar Chart

Can you name the this diagram?Line GraphLine Graph

Types of Data PresentationTypes of Data Presentation

PictogramPictogramCan you name the this diagram?

Types of Data PresentationTypes of Data Presentation

There are also other ways to There are also other ways to represent datarepresent data

• a representation of data using sectors in a circle.

• most suitable to illustrate and compare The overall values of different data categories.

• Pie charts can be construct using the data in percentages and numbers.

How to construct a Pie ChartHow to construct a Pie Chart in MS Excel in MS Excel

Video Video

‘‘ConstructingPieChart_usingMSExcel’ConstructingPieChart_usingMSExcel’

Steps to construct a pie chart Steps to construct a pie chart using compasses and protractorusing compasses and protractor

1) Calculate the angle of every sector to be

included in the pie chart

2) Draw a circle of a suitable size

3) Divide the area of the circle into

sectors according to their calculated angles

4) Label the pie chart and give it a suitable title

GradeGrade Number of studentsNumber of students

AA 2020

BB 4545

CC 7575

DD 4545

TotalTotal 200200

Example 1Example 1

Construct a pie chart using the given Construct a pie chart using the given numbersnumbers

The table shows the number of students with their grades.

GredGredNumber of Number of

studentsstudents

AA 2020

BB 5050

CC 7575

DD 5555

 

 

 

 

Angle of Angle of each each

Sector Sector 

Construct a pie chart using the given Construct a pie chart using the given percentagespercentages

360200

20

200

36020

200

7200

360200

50

200

36050

200

18000

90

360200

75

200

36075

200

27000

360200

55

200

36055

200

19800

360

36

135 99

TotalTotal 200 200

CONSTRUCT A PIE CHARTS

135°99°

A

B

C

Pie chart shows number of students with their grades.

..

D

36°

GamesGames Percentages(%)Percentages(%)

BadmintonBadminton 2020

HockeyHockey 1515

FootballFootball 3535

Tennis Tennis 1010

VolleyballVolleyball 2020

TotalTotal 100100

Example 2Example 2

Construct a pie chart using the given Construct a pie chart using the given percentagespercentages

The table shows the percentage of various games preferred by students

GamesGamesPercentagesPercentages

(%)(%)

BadmintonBadminton 2020

HockeyHockey 1515

FootballFootball 3535

Tennis Tennis 1010

 

 

 

 

Angle of Angle of each Sector each Sector 

Construct a pie chart using the given Construct a pie chart using the given percentagespercentages

360100

20

100

36020

100

7200

360100

15

100

36015

100

5400

54

360100

35

100

36035

100

12600

360100

10

100

36010

100

3600

360

72

126100

Total 100Total 100

CONSTRUCT A PIE CHARTS

120°

100°

badminton

Hockey

Football

Pie chart shows the percentages of various games preferred by students

Tennis

54°

72°

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