pandas.core.groupby.GroupBy.sem

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 : integer, default 1

degrees of freedom

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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.24.2/reference/api/pandas.core.groupby.GroupBy.sem.html