1.

Find the mean and variance for each of the data in Question:

Answer»

Solution :
Let ASSUMED mean `A=100`
Mean `=A+(sumf_(i)d_(i))/(sumf_(i))`
`=100+0/22`
`=100+0=100`
Variance `sigma^(2)=1/(N^(2))[Nsumf_(i)d_(i)^(2)-(sumf_(i)d_(i))^(2)]`
`=1/(22)^(2)[22xX640-0]`
`=29.09`


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