Does the difference between root categoriality and stem categoriality correlate with anything else?

Categoriality difference and morphs per stem
valuecategoriality
difference
morphs
per stem
language
Latin 0.692.02
Spanish 0.291.54
Yucatec 0.201.45
Mandarin 0.201.82
English 0.151.29
German 0.081.27
average 0.28 1.57

Correlation: the more morphs, the higher the categoriality.
Exception: Mandarin.