Question

find mean median and mode of following data
class interval 0-10 10-20 20-30 30-40 40-50 frequency 5,7,8,6,4​

Answer 1

Answer:

Meqn= 24, median=24.5, mode=25

Step-by-step explanation:

class interval. fq. CF. xi. fixi

0-10. 5. 5. 5. 25

10-20. 7. 12. 15. 105

20-30. 8. 20. 25. 200

30-40. 6. 26. 35. 210

40-50. 4. 30. 45. 180

total. 30. 720

mean= fixi/xi

=> 720/30 => 24

median= L+{(n/2)-CF/fq} h

n/2=30/2=15

= 20+(15-12/8)10 =20+(3/4)5

= 20+(15/4)

= 80+18/4

= 98/4 = 24.5

mode = L+(f1-f0/2f1-f0-f2)h

= 20+ (8-7/(2)8-7-6)10

= 20+(1/16-13)10

= 20+1/2(10)

20+5

25