AAIA AI Auditing Tools And Techniques Practice Question
Which aspect of 'Data Drift' does the 'Population Stability Index' (PSI) measure?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change in population distribution
PSI measures how much the distribution of a variable has changed between the training set and the production dataset.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change in model parameters
Why it's wrong here
Parameter change refers to fine-tuning or retraining.
- ✗
Change in model accuracy
Why it's wrong here
Accuracy measures performance, not distribution shifts.
- ✓
Change in population distribution
Why this is correct
PSI quantifies the shift in data distributions over time.
- ✗
Increase in inference latency
Why it's wrong here
Latency is a timing metric.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official ISACA exam blueprint
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