2.3 DATA IN GRAPHICAL FORM

Learning Represent a set of
Outcomes data in graphical

Unit 2.3 form
Data in Graphical Form

Analyse and
interpret data in
graphical form

DUM 30032 Engineering Mathematics 3 Unit 2 : Statistics Idayu Sensei

Information
Needed in
Presenting

DUM 30032 Engineering Mathematics 3 Unit 2 : Statistics Idayu Sensei

Angle of Sector,  1. Bars side by side
2. Can be horizontal or vertical.
= Frequency of Data 3. The length of bar indicates the size of data.

 360
Total Frequency

1. 2.
Pie Chart Bar Chart

3. 4. 5.
Histogram Frequency Polygon Ogive

No gap between bars. Joint all the midpoints of the The curve that obtained by
x-axis can be : lass intervals of the plotted of cumulative
a. boundaries histogram. frequency.
b. class interval
c. midpoint

1. Pie Chart Interpreting
Data

The angle of a sector is
proportional to the
frequency of each data
category.

2. Bar Chart Information given from
a. title of the bar chart
DUM 30032 Engineering Mathematics 3 Unit 2 : Statistics Idayu Sensei b. Labels of the axes

3. Histogram Interpreting
Data

Highest Bar :
Class Interval refer to Modal Class

Sum of grouped data.
Value of mean.

4. Frequency Polygon As same as Histogram.

5. Ogive By taking upper class boundaries,
frequencies which are less than based
DUM 30032 Engineering Mathematics 3 Unit 2 : Statistics Idayu Sensei
can be determined.