Recent content by Dans123

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    Adding variances and getting standard dev from results

    intuitively I think mean of riginal return/ Sqrt ( VARa + VARb) or mean of net return / Sqrt ( VARa + VARb) Just not certain
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    Adding variances and getting standard dev from results

    I do know, just unsure of how. Maybe and example to clarify? An investment over 3 years returned 12%, 4%, 6%. The mean is 7.3% The Stdev is .042 Where Standard deviation = risk, the risk-adjusted return is 7.3 /.042 We assume these returns are investor profits, unless something else...
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    Adding variances and getting standard dev from results

    Dason, thanks for responding. Here is the problem. I hope you can help: I have two columns of data Column A is returns Column B is a percent that will be removed from the returns Column C is the returns adjusted down after the percent is removed. This column my not be useful. Column A's...
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    Adding variances and getting standard dev from results

    If I have non-related datasets, can I find the variances to each and add them, then take the sqrt. to get the combined standard deviation? Thank you!