Python statistics.variance() Method

Statistic Methods : Calculate the variance from a sample of data

Definition and Usage

The statistics.variance() method calculates the variance from a sample of data (from a population).

A large variance indicates that the data is spread out, - a small variance indicates that the data is clustered closely around the mean.

Tip: To calculate the variance of an entire population, look at the statistics.pvariance() method.

statistics.variance(data, xbar)

Parameter	Description
data	Required. The data values to be used (can be any sequence, list or iterator)
xbar	Optional. The mean of the given data. If omitted (or set to None), the mean is automatically calculated

Note: If data has less than two values, it returns a StatisticsError.

Return Value:	A `float` value, representing the sample variance of the given data
Python Version:	3.4

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