Question

calculate median class
80-90 70-80 60-70 50-60 40-50 30-40 20-30 10-20
frequency
19 24 28 52 63 15 9 4

Answer 1

10-20,20-30,30-40,40-50,50-60,60-70,70-80,80-90

4,9,15,19,24,28,52,63