Moneyball: what the film left out and why (sample) size matters

The book tells the story of the Oakland Athletics' 2002 season, where General Manager Billy Beane and his assistant Paul DePodesta used advanced statistical analysis, known as sabermetrics, to assemble a competitive team despite a limited budget. The approach, pioneered by Bill James, focused on metrics such as on-base percentage and slugging percentage rather than traditional measures like batting average and runs batted in. This data-driven strategy allowed the Athletics to compete with teams having much larger payrolls, like the New York Yankees, and achieve significant success, including a 20-game winning streak and a playoff appearance.