C04 · Lesson 20 of 22 · 14 min · 5 hands-on tasks
Regression to the Mean
Raj's 'Installer of the Quarter' winners always seem to slip next quarter, and the installers he sends for retraining always improve. So awards breed complacency and retraining works? Simulate skill plus luck, watch the illusion appear with nobody changing anything, and learn how to tell a real effect from this one.
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