question_answer

  Find the median of the following data

Classes	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80	80-90	90-100
Frequency	5	3	4	3	3	4	7	9	7	8

Answer:

   

Classes	Frequency	Cumulative frequency c.f.
0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100	5 3 4 3 3 4 7 9 7 8	5 8 12 15 18 22 29 38 45 53
	53

Here,     The cumulative frequency just greater than i.e.  is 29 and the corresponding class is 60-70.  median class is Now, Median