Add the result for each investment together to get the expected result of your portfolio. In order to calculate standard deviation, figure out the mean or the average in the data set. For each of ...

Traders and analysts use a number of metrics to assess the volatility and relative risk of potential investments, but one of the most common is standard deviation. Read on to find out more about ...

Key Points Short-term standard deviation is best used for Cp and Cpk. When calculating Pp and Ppk, the long-term standard deviation is your best choice. These measurements are commonly confused, even ...