1. Find missing value from the following data
`-9,-4,a,5,8,11` and median`=2`

Solution:
Here `-9,-4,a,5,8,11`

`M = (text{value of } (n/2)^(th) text{ observation} + text{value of } (n/2 + 1)^(th) text{ observation})/2`

`2 = (text{value of } (6/2)^(th) text{ observation} + text{value of } (6/2 + 1)^(th) text{ observation})/2`

`2 = (text{value of } 3^(rd) text{ observation} + text{value of } 4^(th) text{ observation})/2`

`2=(a+5)/2`

`4=a+5`

`a=4-5`

`a=-1`

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2. Find missing value from the following data
`70,76,80,85,85,x,95,96,100,108` and median`=85`

Solution:
Here `70,76,80,85,85,x,95,96,100,108`

`M = (text{value of } (n/2)^(th) text{ observation} + text{value of } (n/2 + 1)^(th) text{ observation})/2`

`85 = (text{value of } (10/2)^(th) text{ observation} + text{value of } (10/2 + 1)^(th) text{ observation})/2`

`85 = (text{value of } 5^(th) text{ observation} + text{value of } 6^(th) text{ observation})/2`

`85 = (85+x)/2`

`170=85+x`

`x=170-85`

`x=85`

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