Following is the age distribution of a group of a student . Draw the cumulative frequency curve of 'less than ' type and hence obtain the median value

Explanation

From the given table , we may prepare the ('less than ' type ) cumulative frequency table as shown below
On a graph paper , we take the scale
`" Scale: " {{:("Along the x-axis "," 5small div.=1 "),("Along the y-axis " , " 1 small div.=10 "):}` And , plot the points A(5, 36), B(6, 78), C(7, 130),, D(8, 190), E(9, 258), F(l0, 342), G(ll, 438), H(l2, 520), 1(13, 586), ](14, 634), K(15, 684) and L(16, 700).
We join freehand these points st1ccessively a to get the cumulative frequency ct1rve, or an ogive.
Here N=100 `rArr N/2=350`
Take a point P(0, 350) on the y-axis and draw PQ II x-axis, meeting the curve at Q. Draw QM `bot` x-axis, intersecting the x-axis at M whose coordinates are (10, 0).
Hence, median = 10 years