pandas.core.groupby.GroupBy.sem

final GroupBy. sem ( 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 :int, default 1

Degrees of freedom.

Returns

Series or DataFrame

Standard error of the mean of values within each group.

See also

Series.groupby

Apply a function groupby to a Series.

DataFrame.groupby

Apply a function groupby to each row or column of a DataFrame.