Question 1
Find the median and positive count for d=[2,3,1,4,2].
Show your reasoning and explicitly state limitations. Written solutions are assessed by an instructor; the answer key is kept private.
Written problem set
Question 2
Distinguish paired signed-rank from independent rank-sum designs.
Question 3
Explain why tied ranks can affect rank-based tests.
Question 4
Compare a prespecified primary test with a sensitivity analysis transparently.
Scoring
Each task: concept 2, application/calculation 2, bounded interpretation 1. Not official UCL marking.
Formative self-check
These are public learning checks, not private written assignment solutions.