Population mean
The population mean is an average of a group characteristic. The group could be a person, item, or thing, like “all the people living in the United States” or “all dog owners in Georgia”. A characteristic is just an item of interest.
The population mean symbol is μ.
The formula to find the population mean is:
μ = (Σ X)/ N
where:
Σ means “the sum of.”
X = all the individual items in the group.
N = the number of items in the group.
