μ
Symbol  Format  Data 

μ  Code Point 
U+03BC 
TeX 
\mu 

SVG 
The Greek letter (mu) is used in statistics to represent the population mean of a distribution.
The x bar (x̄) symbol is used in statistics to represent the sample mean, or average, of a set of values. It's calculated by adding up all the numbers in the sample and then dividing by the number of values in that sample.
The Greek capital letter Μ is visually very similar to the Latin capital letter M. For that reason, refer to the usage of the Latin capital letter M for math usage.
The population mean formula gives the average value of the whole population.