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Topic: How to minimize a sum
Replies: 6   Last Post: Oct 11, 2013 6:20 AM

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Cristiano

Posts: 36
Registered: 12/7/12
How to minimize a sum
Posted: Oct 10, 2013 4:15 PM
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In this link:
http://en.wikipedia.org/wiki/Weighted_arithmetic_mean#Statistical_properties

there is the formula sigma(x_bar) = sqrt(...).
I need to find the n w's which give the smallest possible sigma(x_bar).
Please, could somebody help me?

Thank you
Cristiano



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