Question 1
Fit the line through (1,5),(2,8),(3,11); predict at x=2.5.
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
Compute the residual when predicted=70 and observed=75.
Question 3
Describe the risk of predicting x=20 from an observed x range 1–3.
Question 4
Interpret R²=0.70 without a causal claim.
Scoring
Each task: concept 2, application/calculation 2, bounded interpretation 1. Not official UCL marking.
Formative self-check · 4 questions
These multiple-choice answers offer public learning feedback; the instructor's written-solution key remains private.