# Recent content by Dans123

1. ### 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
2. ### 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...
3. ### 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...
4. ### 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!