[MB]

Hello,

I need someone to explain to me how Σμ2 ends up as nμ2.

On the third line of the equation, a note says that there are as many "n's" in Σμ2 as in nμ2, but I do not get it.

I will really appreciate any comment or link.

Thanks a lot.

[dawng]

Hi MB,

The important thing here is that μ2 is a constant. This means that

Σμ2 = μ2 + μ2 +μ2 + ... + μ2

and there are n of these μ2's. This gives

Σμ2 = nμ2

Hope this helps,

Dawn

[MB]

Thank you very much Dawn... Yes, now I understand.

[ankitpdr]

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