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  • Draw a ‘less than’ ogive for the following distribution. Hence, find median from the graph.  Marks  Number of Stu

Draw a ‘less than’ ogive for the following distribution. Hence, find median from the graph. 

Marks  Number of Students 
0-10 2
10-20 8
20-30 12
30-40 10
40-50 16
50-60 8
60-70 3
70-80 1

 

 
 
 
 
 

Answers (1)

 

Marks  Number of Students (Cumulative frequancy)
 less than 10 2
less than 20 10
less than 30 22
less than 40 32
less than 50 48
less than 60 56
less than 70 59
less than 80 60

 

Taking upper-class interval on the x-axis and their respective frequencies on the y-axis, Plot point (10,2), (20,10), (30,22), (40,32), (50,48), (60, 56), (70,59), (80,60).

The Median is approx 44.

Posted by

Safeer PP

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