The Pearson Correlation Between X₁ and Y Is R =

question 50

Multiple Choice

The Pearson correlation between X₁ and Y is r = 0.40 and SS_Y = 100.When a second variable, X₂, is added to the regression equation, we obtain R² = 0.25.How much additional variance is predicted by adding the second variable compared to using X₁ alone?

• A)9 points
• B)15 points
• C)25 points
• D)40 points

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