Missingness Mechanisms & Complete-Case Analysis – Practice Quiz

Develop practical judgment in missingness mechanisms & complete-case analysis through 20 original single-select and multiselect problems. Study MCAR, MAR and MNAR relative to observed information, estimand-dependent complete-case validity, selection, and the uncertainty hidden by simple fills. Begin with concepts, then work through calculations, diagnostic scenarios and assumption-sensitive challenges. Prerequisites: probability, regression, statistical inference and the preceding syllabus topics. Detailed worked solutions explain the reasoning and each distractor. Intended easy-to-hard order is retained in the course record; app attempts may reorder questions. Cover: Photo by Lukas Blazek on Pexels. Further reading: mechanism, deletion, dag.