IB skill practice

Interpret residual plots

Use residual size and sign to judge prediction error and model suitability.

Paper 1, Paper 2 5 marks Difficulty 5

Interpret residual plots - graph-supported reasoning

In an manufacturing lab regression, an observed value is 62 and the fitted model predicts 60. Calculate the residual using observed minus predicted. Enter the requested value and choose the interpretation that matches the result.

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