Q. 85.0( 1 Vote )

In a study of diabetic patients in a village, the following observations were noted.


Represent the above data by a frequency polygon.

Answer :

Let’s take two classes interval, first at beginning (0-10) and second at the end (70-80) each with frequency zero.


Now we can draw the frequency table with the help of these two classes,



Now plot the following points on the graph,


A (5,0)


B (15,2)


C (25, 5)


D (35, 12)


E (45, 19)


F (55, 9)


G (65, 4)


H (75,0)


Join the points with line segments


AB, BC, CD, DE, EF, FG, GH, to obtain required frequency polygon. As shown in the figure.



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