Question: You conduct a standard multiple regression analysis with two predictors (X1 and X2), which account for 50% of the variability in the criterion (Y). If

You conduct a standard multiple regression analysis with two predictors (X1 and X2), which account for 50% of the variability in the criterion (Y). If the semi-partial (part) correlations are .3 for X1 and .4 for X2, how much of the variance in Y can be attributed uniquely to X1?

  1. 50%
  2. 40%
  3. 9%
  4. 16%

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