Q5. Based upon the output, which equation explains the cause for variation of Very Vegan’s sales over the sample period? A) The cause cannot be determined using the given information. B) Both the simple linear trend and the log-linear trend have equal explanatory power. C) The simple linear trend.
Q6. With respect to the possible problems of autocorrelation and nonstationarity, using the log-linear transformation appears to have: A) improved the results for autocorrelation but not nonstationarity. B) improved the results for nonstationarity but not autocorrelation. C) not improved the results for either possible problems.
Q7. The primary limitation of both models is that: A) the results are difficult to interpret. B) each uses only one explanatory variable. C) regression is not appropriate for estimating the relationship.
Q8. Using the simple linear trend model, the forecast of sales for Very Vegan for the first out-of-sample period is: A) $113.0 million. B) $97.6 million. C) $123.0 million.
Q9. Using the log-linear trend model, the forecast of sales for Very Vegan for the first out-of-sample period is: A) $121.2 million. B) $117.0 million. C) $109.4 million.
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发表于 2009-1-10 15:59
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