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The following table gives the height of trees:
Height | No. of trees |
---|---|
Less than 7 | 26 |
Less than 14 | 57 |
Less than 21 | 92 |
Less than 28 | 134 |
Less than 35 | 216 |
Less than 42 | 287 |
Less than 49 | 341 |
Less than 56 | 360 |
Given:
The given table gives the height of trees.
To do:
We have to draw 'less than' ogive and 'more than' ogive.
Solution:
We first prepare the cumulative frequency distribution table by less than method as given below:
Represent class intervals along X-axis and cumulative frequency along Y-axis.
Plot the points (7, 26), (14, 57), (21, 92), (28, 134), (35, 216), (42, 287), (49, 341) and (56, 360) on the graph and join them in free hand to get an ogive as shown.
We first prepare the cumulative frequency distribution table by more than method as given below:
Represent class intervals along X-axis and cumulative frequency along Y-axis.
Plot the points (0, 360), (7, 334), (14, 303), (21, 268), (28, 226), (35, 144), (42, 73) and (49, 19) on the graph and join them in free hand to get an ogive as shown.