QCAA General Maths EA Practice Questions - QCAA General Mathematics External Assessment (Queensland) Exam

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For a least-squares regression line, the correlation coefficient is r = 0.8. What is the coefficient of determination, and how is it interpreted?

0.64; about 64% of the variation in the response is explained by the regression 0.8; about 80% of the variation is explained 0.9; about 90% of the variation is explained 0.64; about 64% of points lie on the line

Correct Answer:

0.64; about 64% of the variation in the response is explained by the regression

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