How do I calculate the standard deviation?
If you need to calculate the standard deviation of a set of data, a useful formula to use is
SD = sqrt(Σ (x - mean)2 / n). To get started, you'll need to first calculate the mean of your data. Once you have the mean, you can calculate the squared differences between each data point and the mean. After you've added up the squared differences, you can use the formula above to calculate the standard deviation.
For more information on calculating standard deviation, you can reference helpful tutorials online, or find helpful functions in programs like Sourcetable.