DOC FIX Consistent formulae for metrics in the user guide (#24673)
DOC FIX Consistent formulae for metrics in the user guide (#24673)

Co-authored-by: Mike Altonji <2d449654fb5ed2ab63bb0788909a12687b14fc86@gmail.com>
Co-authored-by: Arturo Amor <b1dd74a02e79ce9737526b732ac13b82b6a2844f@users.noreply.github.com>
betatim/scikit-learn,betatim/scikit-learn,scikit-learn/scikit-learn,vinayak-mehta/scikit-learn,vinayak-mehta/scikit-learn,espg/scikit-learn,scikit-learn/scikit-learn,espg/scikit-learn,vinayak-mehta/scikit-learn,vinayak-mehta/scikit-learn,scikit-learn/scikit-learn,scikit-learn/scikit-learn,espg/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,espg/scikit-learn