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Michigan sophomore Moritz Wagner’s three-point shot was badly off when the Wolverines played Ohio State earlier this season. Two attempts barely grazed the rim and a third was an air ball on the way to finishing 0-for-4 from three-point range.

In a subsequent practice, Michigan head coach John Beilein set out to fix Wagner’s problems using one of basketball’s hottest new diagnostic tools: a machine that measures the arc of a shot as it reaches the hoop. The shot-analyzing technology, developed by an Alabama-based company…