Q2. Which of the following reports the correct value and interpretation of the R2 for this regression? The R2 is: A) 0.048, indicating that the variability of industry sales explains about 4.8% of the variability of company sales. B) 0.952, indicating that the variability of industry sales explains about 95.2% of the variability of company sales. C) 0.952, indicating the variability of company sales explains about 95.2% of the variability of industry sales.
Q3. What is the predicted value for sales of Company XYZ given industry sales of $3,500? A) $994.88. B) $900.00. C) $883.72.
Q4. What is the upper limit of a 95% confidence interval for the predicted value of company sales (Y) given industry sales of $3,300? A) 877.13. B) 827.87. C) 318.42.
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发表于 2009-1-7 14:12
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