标准差怎么算呢标准差英文

The standard deviation is a measure of the amount of variation or dispersion in a set of data values. It is calculated by taking the square root of the variance. The formula for calculating the standard deviation is as follows:

Standard Deviation = √(Σ(xi - x̄)² / N)

Where:

• Σ represents the sum of the values
• xi represents each individual value in the data set
• x̄ represents the mean (average) of the data set
• N represents the total number of values in the data set

The standard deviation is often denoted by the symbol "σ" (sigma) in statistics.