Question

184) What are the main limitations of Statistics
(b) Construct a frequency polygon without histogram:
Marks
10-20 20-30 30-40 40-50 50-60 60-70
no of students 10,15,20,22,15,10​

Answer 1

Explanation:

Mark the class intervals along the X-axis and the number of students along the Y-axis. Draw a histogram for the given data. Now mark the mid points of the upper sides of the consecutive rectangles. The mid points are joined with the help of a ruler. Note that, the first and last edges of the frequency polygon meet at the mid point of the vertical edges of the first and last rectangles.