Find the mode of following data.
Class 0 – 20 20 – 40 40 – 60 60 – 80 80 – 100 100 – 120 120 - 140
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Step-by-step explanation:
C.I F
i
0−20
20−40
40−60
60−80
80−100
100−120
120−140 6
8
10
12
6
5
3
Highest frequency =12
Modal class =60−80
l=60,F
0
=10,F
1
=12,F
2
=6,h=20
Mode =l+(
2F
1
−F
0
−F
2
F
1
−F
0
)×h
=60+
2×12−10−6
12−10
×20
=60+
8
2
×20=60+5=65
Mode =65
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