Top 20
Prep plan
Updated weekly · Last refresh Aug 30

PSI CRO Data Scientist Interview Questions

The questions to prepare for a PSI CRO Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

20questions
~3htotal time
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1
Statistics & ProbabilityStart here. 6 questions · ~48 min
Multi-Center Trial Statistical ChallengesHard

Tests ability to reason about trial design and analysis issues specific to multi-site clinical data.

PSI CRO
Missing Data in Longitudinal StudiesMedium

Tests ability to choose appropriate missing-data methods and assess bias risk in longitudinal clinical analyses.

BiasPSI CRO
Statistical Significance in TrialsMedium

Tests understanding of hypothesis testing, p-values, and clinical trial decision-making.

Statistical SignificancePSI CRO
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2
SQL & Data Manipulation3 questions + 3 drills · ~54 min
3
Behavioral & Leadership8 questions · ~64 min
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4
More topics3 questions · ~24 min
Designing an A/B Test for TreatmentHard

Tests experimental design thinking and awareness of biases, endpoints, and operational pitfalls in studies.

A/B TestingPSI CRO
Clinical Trial Success MetricsMedium

Tests ability to connect endpoints and statistical measures to meaningful trial success criteria.

primary metricsPSI CRO
Diagnosing a Drop in Key MetricsMedium

Tests troubleshooting approach using data quality checks, stratification, and statistical investigation.

DiagnosisPSI CRO
The finish line: interview-readyComplete all 20 questions plus 3 hands-on drills to finish this plan.