Numerical Anomaly calculation in `tfdv.validate_statistics`

In Lab1, I set the age limits as,

tfdv.set_domain(schema, 'age', schema_pb2.IntDomain(name='age', min=47, max=1200))

and I added an anomaly age of 5 to validation set however, tfdv.validate_statistics only detects 0 age and not 5.

Any clue why it only detects the smallest anomaly and not 5?

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