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1 The partial slope corresponds to the direct effect in

1. The partial slope corresponds to the direct effect in a path diagram.

2. The indirect effect of an explanatory variable is the difference between the marginal and partial slopes.

3. If we reject H0: β1 = β2 = 0 using the F-test, then we should conclude that both slopes are different from zero.

4. If we reject H0: β2 = 0, then we can conclude that the increase in R2 obtained by adding X2 to the regression is statistically significant.

5. The main use for a residual plot is finding nonlinear effects in multiple regression.

6. A calibration plot summarizes the overall fit of a regression model.

2. The indirect effect of an explanatory variable is the difference between the marginal and partial slopes.

3. If we reject H0: β1 = β2 = 0 using the F-test, then we should conclude that both slopes are different from zero.

4. If we reject H0: β2 = 0, then we can conclude that the increase in R2 obtained by adding X2 to the regression is statistically significant.

5. The main use for a residual plot is finding nonlinear effects in multiple regression.

6. A calibration plot summarizes the overall fit of a regression model.

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