Agriculture Reference
In-Depth Information
Fig. 8.3
Stacked bar
diagram of educational
status of five blocks
Fig. 8.4
Clustered bar
diagram of educational
status of five blocks
Fig. 8.5
Yield frequency
histogram of 130 varieties
of paddy
obtained. To complete the polygon, it is cus-
tomary to join the extreme points at each end
of the frequency polygon to the midpoints of
the next higher and lower class intervals on a
horizontal line (class axis here). For the pur-
pose, generally two hypothetical classes, one
before the lowest actual class and another at
the last of the highest actual class, are added
with zero observation in both cases so that
the frequency line diagram completes a
bounded area with horizontal
X
-axis as
shown below (Fig.
8.6
):
(e)
Pie Chart
: The basic idea behind the forma-
tion of a pie diagram is to take the whole
frequencies in 100% and present it in a circle
with 360
angle at the center. In the fre-
quency distribution table, ordinary frequency
or relative frequency can effectively be used
