If the optional second argument *mu* is given, it should be the mean
of *data*. If it is missing or None (the default), the mean is
- automatically caclulated.
+ automatically calculated.
Use this function to calculate the variance from the entire population.
To estimate the variance from a sample, the :func:`variance` function is
If the optional second argument *xbar* is given, it should be the mean
of *data*. If it is missing or None (the default), the mean is
- automatically caclulated.
+ automatically calculated.
Use this function when your data is a sample from a population. To
calculate the variance from the entire population, see :func:`pvariance`.