<Women is a (significantly!) larger group than Mothers> Sure, because the former is a superset of the latter. If you meant instead that "childless Women is a

<Women is a (significantly!) larger group than Mothers> Sure, because the former is a superset of the latter. If you meant instead that "childless Women is a (significantly!) larger group than Mothers", even that stat defies meaningful comparison by including teenagers, clear down to 15-year-olds. A more relevant comparison for this workplace discussion would be constrained to a post-college-age group (say, ages 21-44).