How to Find Measures of Variability? (+FREE Worksheet!)
A variance is a number that indicates how a series of data is distributed around the mean value. The sample variance of a set of \(n\) sample data is the number \(s^2\) defined by the formula \(s^2={\frac{∑(x- \bar x)^2}{n-1}}\). The square root \(s\) of the sample variance is called the sample standard deviation of a set of \(n\) […]