Free simulators with the question count and time limit of the official exams.
Start practicing freeOct 19, 2026
Business Data Analytics · 17 min
Weekly Breakdown issue 1, CBDA: three fictional cases and 15 original exam-style questions on research questions, source data and reporting results, each checked against the Guide.
Oct 13, 2026
Business Data Analytics · 7 min
p = 0.03 does not mean a 97% chance the new flow is better. A CBDA deep dive into the p-value meaning, its two classic misreadings, and significance vs effect size.
Oct 12, 2026
Business Data Analytics · 6 min
Surveying only active customers to explain churn measures the people who stayed. A CBDA deep dive into survivorship bias, sampling frames and the data bias checkpoint.
Oct 11, 2026
Business Data Analytics · 6 min
Sales rose 18% after a campaign. Did the campaign cause it? A deep dive into correlation vs causation for CBDA candidates, with the trap behind each option.
Oct 10, 2026
Business Data Analytics · 9 min
The CBDA exam has 75 scenario-based questions in 2 hours, six weighted domains, and costs $250–$405. Here is what it tests, how hard it is, and why people fail.
Oct 10, 2026
Business Data Analytics · 8 min
A week-by-week CBDA study plan for the IIBA exam: 75 scenario questions in 2 hours, six domains, about 50 hours of work, and the order that fits the exam weights.
Oct 9, 2026
Business Data Analytics · 15 min
Twelve original CBDA scenario questions in blueprint proportions across all six domains, with explanations tied to Guide sections and a method for reading long scenarios.
Oct 9, 2026
Business Data Analytics · 12 min
Twelve original CBDA data quality questions on validation, lineage, data dictionaries, masking, privacy, survey bias and metadata, with explanations tied to the Guide.
Oct 9, 2026
Business Data Analytics · 15 min
Twelve original CBDA practice questions on picking charts by goal, reading boxplots, ROC curves and residual plots, and fixing visualization anti-patterns, with explanations.
Oct 9, 2026
Business Data Analytics · 16 min
12 original CBDA statistics questions with worked answers: mean vs median, IQR fences, p-values, Type I errors, confidence intervals, sample size, r vs R² and residual plots.
Oct 9, 2026
Business Data Analytics · 12 min
Twelve original CBDA practice questions on Domain 6: analytics operating models, talent and data strategy, with a full answer key tied to Guide sections.
Oct 9, 2026
Business Data Analytics · 12 min
Twelve original CBDA practice questions on Domain 5: valuing solution options, decision trees, implementation plans, simulation, optimization and managing change.