Hello,

I am verifing an exact value of the 2nd moment E(R^2) of a sample range (R) from the standard normal distribution. To let you clearly know what is the question that I am confronted with. Please see the attachments for details.

To save your time, you can only read the highlighted part on page 1 to get the context. My question is at the end of page 2.

Your help is highly appreciated !

Thanks a lot in advance.

DHB10 from China, PRC

I am verifing an exact value of the 2nd moment E(R^2) of a sample range (R) from the standard normal distribution. To let you clearly know what is the question that I am confronted with. Please see the attachments for details.

To save your time, you can only read the highlighted part on page 1 to get the context. My question is at the end of page 2.

Your help is highly appreciated !

Thanks a lot in advance.

DHB10 from China, PRC

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