Question

Find the Median
Class Interval : 11-13 13-15 15-17 17-19 19-21 21-23 23-25
frequency: 4 5 13 20 14 8 4

Answer 1

Answer:

hEllo friends good afternoon

Answer 2

Step-by-step explanation:

Answer

Class Interval Mid Value

x

i

Frequency

f

i

f

i

x

i

11 - 13 12 3 36

13 - 15 14 6 84

15 - 17 16 9 144

17 - 19 18 13 234

19 - 21 20 f 20 f

21 - 23 22 5 110

23 - 25 24 4 6

∑f=40+f ∑fx=704+20f

Given : Mean =18

We know, Mean (

x

)=

Σf

Σfx

⟹18=

40+f

704+20f

⟹18(40+f)=704+20f

⟹720+18f=704+20f

⟹720−704=20f−18f

⟹2f=16

⟹f=8