The x bar symbol is used in statistics to represent the sample mean of a distribution.
Symbol  Format  Data 

x̄  Unicode 

TeX 


SVG 
The arithmetic mean, also called the sample mean, is the average of a sample space. To calculate the arithmetic mean sum all the data points in a sample space and then divide by the number of elements.
The Greek letter μ (mu) is used in statistics to represent the population mean of a distribution.