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Anomaly detection
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134.
Contextual vs Point Anomalies
medium
In a time series, a contextual anomaly occurs. How does it differ from a point anomaly?
A
A contextual anomaly always has a larger magnitude deviation than a point anomaly in the same series
B
A contextual anomaly is detected by global thresholds while a point anomaly requires local comparison
C
A contextual anomaly affects multiple consecutive time steps while a point anomaly affects only one
D
A contextual anomaly is normal globally but anomalous given its temporal or contextual neighborhood
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