The Terps are giving up 75.9 points per game, the fourth-worst mark in the Big Ten.
Collins and Bibby combined for 30 points and 23 rebounds against the Badgers.
Mimi Collins grabbed a career-high 17 rebounds to lead the Terps.
Diamond Miller had 23 points for the Terps, who extended their win streak to nine games.
Alaysia Styles, a graduate transfer from Cal, impressed coming off the bench in her home debut.
It's the first time the Terps have ranked in the Top 10 this season.
The Terps are undefeated since her injury on Dec. 3.
Five players scored in double-digits for the Terps, who continued their undefeated start in Big Ten play.
Late free throws from Katie Benzan and Ashley Owusu helped the Terps hold off the Hoosiers.