2. Draw an ogive for the following data Class interval 1-10 11-20 21-30 31-40 41-50 51-60 Frequency 3 5 8 7 6 2
{Hint: convert inclusive form into exclusive form first}
Answers
Given : Class interval 1-10 11-20 21-30 31-40 41-50 51-60 Frequency 3 5 8 7 6 2
To Find : Draw O give
Solution:
Class interval 1-10 11-20 21-30 31-40 41-50 51-60
Frequency 3 5 8 7 6 2
Class f More than CF Less than CF
0.5 - 10.5 3 31 3
10.5 - 20.5 5 28 8
20.5 -30.5 8 23 16
30.5 -40.5 7 15 23
40.5 -50.5 6 8 29
50.5 -60.5 2 2 31
Graph attached
Less than ogive
The points with the upper limits of the class are plotted on x axis and the corresponding less than cumulative frequencies on y axis.
The points are joined by free hand smooth curve to give less than cumulative frequency curve or the less than Ogive
More than ogive
The points with the Lower limits of the class are plotted on x axis and the corresponding more than cumulative frequencies on y axis.
The points are joined by free hand smooth curve to give more than cumulative frequency curve or the More than Ogive
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