Exercises
Mix and Match
Match the item in the first column with the concept that can be observed, test statistic, or estimate from the second column.
| 1. Scatterplot of Y on X1 | (a) Similar variances |
| 2. Scatterplot of Y on X2 | (b) F-statistic |
| 3. Scatterplot of X2 on X1 | (c) Collinearity |
| 4. Direct effect of X2 | (d) Nearly normal errors |
| 5. Indirect effect of X2 | (e) Nonlinear effect |
| 6. Scatterplot of Y on | (f) Product of marginal slopes |
| 7. Scatterplot of e on | (g) Partial slope for X2 |
| 8. Normal quantile plot | (h) Leveraged outlier |
| 9. Test H0: β1 = β2 = 0 | (i) t-statistic |
| 10. Test H0: β2 = 0 | (j) Calibration plot |
True/False
Mark each statement True or False. If you believe that a statement is false, briefly explain why you think ...
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