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| function removeOutliersByZScore(data: number[], threshold = 2) { | |
| const mean = data.reduce((acc, val) => acc + val, 0) / data.length | |
| const stdDev = Math.sqrt(data.reduce((acc, val) => acc + Math.pow(val – mean, 2), 0) / data.length) | |
| return data.filter((val) => Math.abs((val – mean) / stdDev) < threshold) | |
| } |