Definition of sample mean in English English dictionary
Given a random sample \textstyle \mathbf{x}_{1},\ldots,\mathbf{x}_{N} from an \textstyle n-dimensional random variable \textstyle \mathbf{X}, a mean defined as
The sample mean is an estimator available for estimating the population mean It is a measure of location, commonly called the average, often symbolised as where