Agriculture Reference
In-Depth Information
Fig. 8.6
Yield frequency
polygon and histogram of
130 varieties of paddy
Fig. 8.7
Pie diagram of
yield frequency for 130
varieties of paddy
in the form of a pie diagram. Thus, for exam-
ple, the yield data following a pie chart is
prepared with class frequencies (Fig. 8.7 ).
The advantage of pie diagram is that differ-
ent characteristics measured in different units
and or under different situations can be
compared with the help of this diagram.
Moreover, along with other diagrammatic
data presentation, this method is also appeal-
ing to both illiterate and educated persons.
Taking the example of an expenditure
pattern of two groups of people, pie diagram
could be used for comparison (Table 8.10
and Fig. 8.8 ).
(f) Cumulative Frequency Curve (Ogive):
Partitioning the whole data set can very
well be made with the help of a cumulative
frequency graph, also known as OGIVE.
Table 8.10
Expenditure pattern of two groups of people
Expenditure (Rs)
Group-1
Group-2
Food
1,800
1,600
Housing
6,500
4,500
Clothing
4,000
3,400
Education
1,250
1,650
Medical
800
500
Others
650
350
Total
15,000
12,000
type,” one plots the points with the upper
boundaries of the classes as abscissa and the
corresponding cumulative frequency as
ordinates. The points are joined by a freehand
smooth curve. For “more than equal to type”
one plots the points with the lower
boundaries of the classes as abscissas and
the corresponding cumulative frequencies as
ordinates. Then, the points are joined by a
freehand smooth curve (Fig. 8.9 ).
It is
of two different types, that is, “less than type”
and “more than equal to type.” For “less than
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