You were running a simple regression of birth weight as the dependent variable on mother's age. You add as an independent variable the distance lived from the nearest hospital, and find a insignificant, but positive coefficient. What does this do to the regression's R-squared? Has no effect Not enough info Increases it Decreases it.

1. You were running a simple regression of birth weight as the dependent variable on mother's age.
You add as an independent variable the distance lived from the nearest hospital, and find a
insignificant, but positive coefficient. What does this do to the regression's R-squared? Has no
effect Not enough info Increases it Decreases it