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.
A second free set of 35 CBDA mock questions, weighted like the IIBA exam blueprint, with a full answer key and a Guide section reference for every answer.
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.
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.
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.
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.
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.
Twelve original CBDA data quality questions on validation, lineage, data dictionaries, masking, privacy, survey bias and metadata, with explanations tied to the Guide.
