Draw a cumulative frequency curve and cumulative frequency polygon for the following frequency distribution by less than method.

Explanation

The given frequency distribution is not continuous. So, we first make it continuous and prepare the cumulative frequency distribution as under.


`(##X_RD_07_E01_37_s01##)`


Now, we plot points (9.5,5),(19.5),(29.5,40),(39.5,63),(49.5,80),(59.5,91)and(69.5,100). and join them by a free hand smooth curve to obtain the required ogive as shown in Figure.


The cumulative frequency polygon is obtained by joining these points by line segments as shown in Figure.


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