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
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