1.

Find the mean and standard deviation using shout-cut method.

Answer»

SOLUTION :
LET assumed mean `A=64`
`:.` Mean `=A+(sumf_(i)d_(i))/(sumf_(i))=64+0/100`
`=64`
STANDARD deviation `=SQRT((sumf_(i)d_(i)^(2))/N-((sumf_(i)d_(i))/N)^(2))`
`=sqrt(286/100-0)=sqrt(286/100)`
`=sqrt(2.86)=1.69`


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