This document discusses graphical representation of data through various charts and diagrams. It introduces common types of graphs like line diagrams, bar diagrams, pie charts and histograms. Bar diagrams are used to compare data between groups, pie charts show proportions, and histograms display frequency distributions. Graphical representation makes data easier to visualize, compare, understand and analyze compared to raw numbers. Examples of each type of graph are provided to illustrate how data can be visually depicted.

1. GRAPHICAL REPRESENTATION OF DATA
SUBMITTED BY
LOHASRI.C

2. CONTENT
 Introduction
 Importance
 Types
 Conclusion

3. INTRODUCTION
 The transformation of data through visual methods like
graphs, diagrams and charts is called as representation of
data.
 Pictures can covey an overall message much better than
the list of numbers.

4. NEED & IMPORTANCE
 It permits easy visualization.
 It facilitates comparitive study of different aspects of a
given data.
 The data can be easily understood just by a glance over
the graph.
 It helps a great deal in the analysis of data.

5. TYPES OF CHARTS & DIAGRAMS
 Line Diagram
 Simple Bar Diagram
 Multiple Bar Diagram
 Pie Diagram ( Circular Diagram )
 Histogram
 Frequency Polygon

6. LINE DIAGRAM
 Line chart is a type used to shown the information by
plotting the sevaral points which represents the data in
the X and Y axis.
 The horizontal line is known as x axis.
 The vertical line is known as y axis.

7. EXAMPLE
Grade 7 8 9 10 11 12
Marks(
%)
72 75 81 80 83 91

8. SIMPLE BAR DIAGRAM
 This type of bar chart is the simplest one.
 Bar lines are placed either vertically or
horizontally.
 The starting point & the spacing will be same.

9. EXAMPLE
State Washingt
on state
illinois Massach
settes
Newyork
Count 62 55 35 61

10. MULTIPLE BAR DIAGRAM
 In this diagram, bars are placed side by side along
with their values and it is used to do comparison
between 2 or more groups of the statistical data.
 To identify the difference between them the
different color and pattern are used in this bar.

11. EXAMPLE
Days Mon Tues Wed Thurs Fri
Server
1
100 125 245 145 65
Server
2
90 155 165 205 115
Server
3
95 90 55 260 155

12. PIE DIAGRAM
 Pie Diagram is also Known as Circular Diagram.
 It represent the data in the Circular Graph.
 Each sector denotes a proportionate of the whole.
 The term pie represents whole, slices represents
parts.

13. EXAMPLE
Categ
ory
Cloth
es
wash
Fauce Show
er
Toilet Leaks Other
% 21.7 15.7 16.8 26.7 13.7 5.3

14. HISTOGRAM
 The word histogram is derived from GREEK word
HISTOS meaning “ ANYTHING SET UPRIGHT “
 It is similar to vertical bar graph but there is no gap
between the bars.

15. EXAMPLE
Pts 0
to
10
10
to
20
20
to
30
30
to
40
40
to
50
50
to
60
60
to
70
70
to
80
80
to
90
90
to
10
S.
Nu
m
8 10 22 28 35 55 39 20 10 3

16. FREQUENCY POLYGON
 If we mark the midpoints of the top horizontal sides
of the rectangles in a histogram and join them by a
straight line is known as frequency polygon.
 It can be construct it directly from the given
frequency distribution.

17. EXAMPLE

18. CONCLUSION
 So now I conclude that statistical data may be
presented is very helpful to you all.
 It is very easy to understand and Interpretation of
data can be analysed quickly by seen a graph once.

19. THANK YOU !