Try find relationship between E(Π(Π-E(Π))) and var(Π)

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You need to show us your work, and show us where you're stuck, before we can help you. Also, please post homework questions in the appropriate Homework Help forum.

- Warren
 
chroot said:
You need to show us your work, and show us where you're stuck, before we can help you. Also, please post homework questions in the appropriate Homework Help forum.

- Warren

thanks for the reply, there is no homework questions associate with this, all I need is trying to prove there is relationship between E(Π(Π-E(Π))) and var(Π), and not nesserary equal but other relationship like exponential relationship. anybody can help