pandas.core.groupby.GroupBy.sem

GroupBy.sem(self, ddof=1) [source]

Compute standard error of the mean of groups, excluding missing values.

For multiple groupings, the result index will be a MultiIndex.

Parameters:	ddof : integer, default 1 degrees of freedom
Returns:	Series or DataFrame Standard error of the mean of values within each group.

See also

Series.groupby

DataFrame.groupby