Question: Adding a second additional independent variable to the first variable already in the regression model will result in a marked lower adjusted R 2 if

Adding a second additional independent variable to the first variable already in the regression model will result in a marked lower adjusted R2 if

  1. The predictive ability of the second variable is the same as the first variable
  2. The predictive ability of the first variable is lower than the second variable
  3. The predictive ability of the second variable is higher than the first variable
  4. The predictive ability of the second variable is zero.

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