IB skill practice

Interpret coefficient of determination

Interpret \(r^2\) as the proportion of variation explained by a regression model.

Paper 1, Paper 2 5 marks Difficulty 4

Interpret coefficient of determination - context check

Technology output for a community program gives correlation \(r=0.8\). Calculate the percentage of variation explained by the linear model. Confirm the method before entering the value. 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.