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The Pearson Correlation Between X1 and Y Is R =

Question 74

Multiple Choice

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


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

Correct Answer:

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