Scientific calculators typically come with a built-in program for both the mean and standard deviation. These can also be determined by functions in spreadsheet programs such as Excel.

In National 5 Lifeskills Maths standard deviation is a measure of consistency or spread of data. It is used as a comparison between different data sets.

Standard Deviation indicates the volatility of the fund’s returns. Higher standard deviation means higher variation in returns and vice versa. In technical terms, it is a dispersion of returns from ...