Indiana continues to collect signature wins at home.
It was Ferrell's seventh game this season of 20 points or more. Indiana is 6-1 when he hits that number.
Ferrell was clearly the difference in this one. In the first half he hit four 3-pointers, most late in the shot clock. Overall, he was 8-for-10 from the field and 7-of-8 from 3-point range.
Freshman Noah Vonleh had a double-double with 10 points and 12 rebounds. Two of his baskets came in the final 38 seconds on rebound putbacks. The first came with 37.1 seconds to play when Ferrell missed the second of two free throws and Vonleh flushed it back in. Then with 17.5 seconds to play he rebounded a Evan Gordon miss and scored again.
Indiana led by three at the break, and though the game was tied twice in the second half, IU never trailed in the final 20 minutes.
Michigan's Nik Stauskas, who averages 18.4 points per game, was held to six points and just one field goal made. Ferrell was the main player guarding Stauskas and frustrated him throughout the game.
It was IU's second big home win of the season. The other looked impressive at the time against Wisconsin although the Badgers have gone in a tailspin since then. Indiana beat Wisconsin 75-72 on Jan. 14.
Michigan falls to 16-5, 8-1 in Big Ten play at the halfway point while the Hoosiers improve to 14-8 and 4-5.