Question

draw a frequency polygon for the following frequency distribution in which class interval =1-10,11-20,21-30,31-40,42-50,51-60 and frequency is 8,3,12,12,2,7​

Answer 1

Answer:

Construct a histogram for the given data. Mark the mid point of the tops of rectangles of histogram and join these points by line segments. To complete the polygon, mark two classes (−10 to 0) and (80 to 90). Join the end point of the line segments to the mid points of these two classes. The curve so obtained is a frequency polygon.