For the following data, draw a ‘less than’ ogive and hence find the median of the distribution. 

Age 

(in years ) :

0-10 10-20 20-30 30-40 40-50 50-60 60-70

Number of 

persons : 

5 15 20 25 15 11 9

 

 

 

 

 
 
 
 
 

Answers (1)
S safeer

 

Age 

 less than 10 less than 20 less than 30 less than 40 less than 50 less than 60 less than 70

Number of 

persons : 

5 20 40 65 80 91 100

 

Plot Age on x-axis and cumulative frequency on y-axis

N= 100 \implies \frac{N}{2} = 50

Marking a point on the curve whose ordinate is 50 gives an x-ordinate= 33.5

Hence, the Median of the data is 33.5 (approx)

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