Question

Draw less than type" ogive for the following frequency
distribution and find the median c-i 0 - 10 , 10-20, 20-30 , 30- 40, 40-50, 50-60 frequency 3,915,30,18,5​

Answer 1

Class. frequency. less than type

0-10 3. 3

10-20. 9. 3+ 9 = 12

20-30. 15. 12+15= 27

30-40. 30. 27+30= 57

40-50. 18. 57+18= 75

50-60. 5. 74+5 = 80

Median =. L +[N/2 - CF ÷f] × h

here N/2 = 80/2= 40

here 30 -40 is the modal class

therefore L = 30,h= 10, f= 30, CF=27

Now apply the values in the formula

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