Question

find median from the following data
age less than 10 20 30 40 50 60 70 80
frequency 4 16 40 76 96 112 120 125​

Answer 1

c.i f c.f

0-10 4 4

10-20 16 20

20-30 40 60

30-40 76 136

40-50 96 236

50-60 112 348

60-70 120 468

70-80 125 593

593÷2=296.5

m=l+n-,c.f÷,f×10

50+296.5-236÷112×10

50+60.5÷112×10

50+0.540×10

50+5.40=55.40

Answer 2

C.f is already given, so we have to find f from C.f