1.

The weights of coffee in 70 jars is shown in the following table Determin variance and standard deviation of the above distribution

Answer»


SOLUTION :
`thereforesigma^(2)=(Sigmaf_(i)d_(i)^(2))/(Sigmaf_(i))-((Sigmaf_(i)d_(i))/(Sigmaf_(i)))^(2)=(102)/(70)-((-38)/(70))^(2)`
Now =1.4571-02916=1.1655
`sigma=sqrt(1.1655)=1.08g`


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