Leak-free fraud detection across three financial datasets, reported with average precision and bootstrap confidence intervals instead of accuracy. It includes cost-based threshold optimisation, formal hypothesis testing with effect sizes, odds-ratio interpretation and a live interactive explorer.
How it knows: Minimising Z = 100xFN + 1xFP puts the Credit Card threshold at 0.02 (the default is 0.5), which catches 88 of 98 frauds for 83 false alarms, $1,083 of modelled loss against $9,800 for doing nothing.
Nicholas Smith - all work