For the following frequency distribution , draw a cumulative frequency curve of more than type and hence obtain the median value

Explanation

From the given table, we may prepare the ' more than ' series as shown below:

Scale: `{("Along the x-axis, 10 small div,=5"),("Along the y-axis , 1 small div,=1"):}`
Now plot the points A(5,100) B(10,95),C(20,80 ),D( 30, 60),E(40, 37),F(50,20) and (60,9) on a graph paper.
Join AB, BC, CD, DE, EF and FG freehand to get the required curve, as shown below.
Here `N=100 rArr N/2=50`
From P(O, 50) draw PQ II x-axis, meeting the curve at Q. Draw QM `bot` OX, meeting x-axis at M vvhose coordinates are (35, 0).
Hence, median = 35.