pandas.core.groupby.GroupBy.sem¶

final GroupBy.sem(ddof=1, numeric_only=_NoDefault.no_default)[source]¶

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

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

Parameters:

ddofint, default 1: Degrees of freedom.
numeric_onlybool, default True: Include only float, int or boolean data.

New in version 1.5.0.

Returns:

Series or DataFrame: Standard error of the mean of values within each group.