Question

For the following frequency distribution,draw a cumulative frequency curve of 'more than' type and hence obtain the median value. ​

Answer 1

Given : frequency distribution

To Find : draw a cumulative frequency curve of 'more than' type

Solution:

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

0 -   10                 5                100       More than 0

10 - 20                15                95        More than 10

20 - 30               20               80        More than 20

30 - 40               23               60        More than 30

40 - 50               17                37        More than 40

50 - 60               11                 20        More than 50

60 - 70                9                 9          More than 60

Median = 40  - 10 ( 100/2 - 37) /23

= 40 -  5.65

= 34.35

Learn More:

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