online_retail_II.xlsx
Anomaly Detection
Statistical and saved-model analysis of the active transaction dataset.
Statistical anomalies
105,434
20.33% of active rows
Isolation Forest anomalies
43,631
8.41% of active rows
Detected by both
43,076
Cross-method agreement
Isolation Forest overlap
98.73%
Also identified statistically
Anomaly method comparison
Relative anomaly volume detected from Quantity, Price and Revenue.
Statistical IQR105,434 · 20.33%
Isolation Forest43,631 · 8.41%
Statistical anomaly summary
| Feature | Anomaly count |
|---|---|
| Revenue | 45,812 |
| Quantity | 57,744 |
| Price | 35,078 |
| Combined transaction | 105,434 |
Detection agreement
| Both methods | 43,076 |
| Statistical only | 62,358 |
| Isolation Forest only | 555 |
| Normal by Isolation Forest | 474,965 |
Saved model applied