2 If the adjusted Rsquared when a new variable is added it

2.

If the adjusted R-squared _____________ when a new variable is added, it would be an idication that the variable should not remain in the model.

decreases

remains constant

increases

8.

A residual is the difference between the actual value of Y and the predicted value of Y.

9.

When the error assumptions are met, then a scatter plot of the errors should appear random with no discernible pattern.

Solution

2)

If the adjusted R-squared decreases when a new variable is added, it would be an idication that the variable should not remain in the model.

Decrease indicates useless variable and increase indicates usefull variable.

8)

A residual is the difference between the actual value of Y and the predicted value of Y. - False

A residual is the difference between predicted value and actual value.

9)

When the error assumptions are met, then a scatter plot of the errors should appear random with no discernible pattern. - True

Any pattern or shapes in the scatter plot should be rectifie again.