Practice_Questions_Chapter4 (1) - Chapter(4(Prediction(Goodness4of4Fit(and(Modeling(Issues Multiple(Choice(Review(Questions

Practice_Questions_Chapter4 (1) -...

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Chapter 4: Prediction, Goodness4of4Fit, and Modeling IssuesMultiple Choice Review Questions1. Which of the following leads to large forecast errors?a.) larger sample size, Nb.) variation in the explanatory variable, x, is largec.) overall uncertainty in the model, as measured by σAns: dSection: 4.12, is smallerd.) the value of (x0– x̄)2is larger2. At what values of x0will the standard error of the forecast be smallest?3. Which of the following expressions is NOT equal toƩ(yi4 y̅)2?4. What does R2, the coefficient of determination, measure?
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