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Least Squares Regression

AP Statistics· difficulty 2/5

Two models compete: Model A has r-squared = 0.40 and Model B has r-squared = 0.85.

Comparison of two models Model A: R-Sq = 0.40 Model B: R-Sq = 0.85 Which explains more variation?

Which statement is best supported?

  • A

    Cannot be compared without more info

  • B

    Model A is more accurate

  • C

    The models are equally good

  • D

    Model B explains more of the variability in y

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Explanation

Higher r-squared indicates a greater proportion of variability in y explained by the linear model.

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