Question

Make a frequency Polygon and Histigramusing the given data:

Marks Obtained: 10-20 20-30 30-40 40-50 50-60 60-70

No. of students: 5 12 15 22 14 4

Answer 1

Answer:

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.

solution