find median of the following data:- 1.class interval:- 0-10 , 10-20 ,20-30 ,30-40 ,40-50 , 50-60 2.frequency:- 5,8,20,15,7,5
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ClassInterval Frequency c.f. 0−20 6 6 20−40 8 14 40−60 10 24 60−80 12 36 80−100 6 42 100−120 5 47 120−140 3 50 N=50 Here, N=50, then 2N=250=25
∴ Median class =60−80
We have, l=60,c.f=24,f=12 and h=20
Median=l+f2N−c.f×h
=60+1225−24×20
=60+1.66
=61.66
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