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The length of time Y necessary to complete a key operation in the construction of houses...

The length of time Y necessary to complete a key operation in the construction of houses has an exponential distribution with mean 9.74 hours. The formula  

C=96.23+43.19Y+2.75Y2

relates the cost C of completing this operation to the square of the time required to completion. Find the mean of C.

math   Statistics-And-Probability   
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Answer #1

This question just use the relation V(X)=E(Y2)-[E(Y)]2

Please upvote If I am able to help you.

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