presentation of data

2. IN THIS WE WILL KNOW ABOUT-
1. Diagrammatic presentation
 Bar diagram
 Multiple bar diagram
 Percentage bar diagram
 Pie diagram
2. Frequency diagram
 Histogram
 Ogive

3. WHAT IS BAR DIAGRAM?
Bar diagram are those diagram in which
data are presented in the form of bars
or rectangle.

4. FEATURES OF BAR DIAGRAM
 Breath remains the same.
 Bar are at equal distance.
 All bars have common base line.
 These can be presented either in ascending
or descending order.
 Bar may be either vertical or horizontal.

5. TYPES OF BAR DIAGRAM-
 Simple bar diagrams- Simple bar diagram
are those diagram which are based on a
single set of numerical data.

6. Year 1951-60 1961-70 1971-80 1981-90 1991-2000 2001-2010
Birth
rate 45 35 30 28 24 20
0
5
10
15
20
25
30
35
40
45
50
Birth rate
1951-60
1961-70
1971-80
1981-90
1991-2000
2001-2010

7. HORIZONTAL BAR DIAGRAM
0 50 100 150 200 250 300 350
marks
E
D
C
B
A

8. MULTIPLE BAR DIAGRAM
 Multiple bar diagram are those diagram
which shows two or more sets of data
simultaneously.

9. 0
5
10
15
20
25
30
35
40
45
50
1921-30 1921-30 1921-30 1921-30 1921-30 1921-30
birth rate
Death rate

10. PERCENTAGE BAR DIAGRAM
 Percentage bar diagram are those
diagram which shows simultaneously,
different parts of the values of a set of
data in terns of percentage.

11. 0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2007-08 2008-09
Tertiary
Secondary
Primary

12. PIE DIAGRAM
SECTORS
%share
 Primary
18.2
 Secondary
23
 Transport
27.8
 Finance
17.5
 Social Service
13.5

13. %share
Primary
Secondary
Transport
18.2
23
27.8
17.5
13.5

14. FREQUENCY CURVES
 A frequency curve is a curve which is plotted
by joining the mid-points of all tops of a
histogram by free hand smoothed curves.

16. OGIVE OR CUMULATIVE FREQUENCY CURVE
 Ogive is a curve which is constructed by
plotting cumulative frequency data on the
graph paper in the form of a smooth curve.