From the following data of the ages of different persons, prepare less than and more than cumulative frequency distribution: Age (in years) : 20-30 30-40 40-50 50-60 60-70 70-80 No. of persons: 10 15 25 10 7 3
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Explanation:
Age LCM
Less than 10 5
Less than 20 20
Less than 30 40
Less than 40 63
Less than 50 80
Less than 60 91
Less than 70 100
N=100, then
2
N
=
2
100
=50
On y−axis draw horizontal line from 50. The point at which line touches the curve draw vertical line from there towards x−axis
The point at which line touches the x−axis is the median of the data.
∴ Median =34.34
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