AuthorTopic: Weighted mean and Weighted SD
cywong
@2005-08-23 06:55:29		 I understand that the 12C manual explains how to calculate the weighted mean. It does not however explain how to compute a weighted standard deviation. When I refer to the HP 12C solutions handbook, it gives an example of computation of the weighted mean where it requires the pressing of "sto", "+", "0", "x", "sigma+".
Could anyone tell me what is the point of this and why is that different to the simple solution in the 12C manual? More importantly, could anyone please teach me how to compute a weighted standard deviation? thanks very much.

CFA Discussion Topic: Weighted mean and Weighted SD

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