Next month marks the 100th anniversary of Babe Ruth’s first home run. This year, opening day in baseball signals the “closing day” for one of the classic truisms among sports statisticians: the belief that there is no such thing as “hot hitters” or “batter’s slump” in baseball, or the “hot hand” in basketball. This belief is based on famous research by Gilovich and Tversky in 1985 — “The Hot Hand…