## Population Samples: the Mean

## In terms of the human population, we are unable to observe and chart the characteristics population as a whole. When dealing with a population sample the mean is expressed as follows:

## As you can see, the equations are nearly identical; in the case of sample populations, the Roman numeral Mu is replaced with x-bar .

Case Example: Mean Height of UCLA Students

## Nomenclature is also altered when discussing the sample Variance.

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