IB skill practice

Refine models using residual direction

Use residual direction to decide how a model should be adjusted.

Paper 1, Paper 2 5 marks Difficulty 5

Refine models using residual direction - depth scenario

A wildlife survey residual plot is mostly positive at high x-values. State 1 if the model tends to under-predict at high x-values, otherwise 0. Enter the requested value and choose the interpretation that matches the result.

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.