Find the median of the data 56,60,45,50,48 and 65.
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Step-by-step explanation:
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
2
N
=
2
50
=25
∴ Median class =60−80
We have, l=60,c.f=24,f=12 and h=20
Median=l+
f
2
N
−c.f
×h
=60+
12
25−24
×20
=60+1.66
=61.66
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