Mixed Statistical Reasoning Bank

This is a mixed practice set covering all statistical and data reasoning question types found in UCAT Decision Making. Questions are presented in random order to simulate real test conditions.

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Question Types in This Bank

1. Tables and charts — reading and interpreting data displays
2. Probability — basic calculations, complement, addition, multiplication rules
3. Bayesian reasoning — sensitivity, specificity, PPV, 2×2 tables
4. Expected value — weighted averages, risk measures (RR, ARR, NNT)
5. Percentages and proportions — percentage change, ratios, reverse percentages
6. Correlation vs causation — confounders, reverse causation, study design
7. Sample size and significance — evaluating statistical claims
8. Conditional probability — P(A|B), two-way tables
9. Research findings — evaluating study validity and conclusions

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Quick Triage Framework

Question Type	Method	Time Target
Table/chart reading	Locate data → calculate	30–45s
Basic probability	Identify rule → apply formula	30–45s
Bayesian / 2×2 table	Build table → calculate	60–75s
Expected value	List outcomes × probabilities → sum	45–60s
Percentage change	Identify base → apply formula	30–45s
Correlation vs causation	Check study design → identify confounder	30–45s
Significance evaluation	Check sample size, CI, p-value	30–45s
Conditional probability	Build table → divide by condition total	45–60s
Research evaluation	Identify design → check threats	45–60s

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Timing Reminder

• Decision Making: 29 questions in 31 minutes (~64 seconds per question)
• Statistical questions often require calculation — have a clear method for each type
• If a calculation is taking too long, estimate and eliminate unlikely options
• Guessing carries no penalty — never leave a question blank

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Practice

Complete the 10 assessment questions. These cover a mix of statistical and data reasoning types.