Question 1
Regression analysis was applied between sales (Y in $1,000) and advertising (X in $100), and the following estimated regression equation was obtained.
= 80 + 6.2 X
Based on the above estimated regression line, if advertising is $10,000, then the point estimate for sales (in dollars) is
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$62,080
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$142,000
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$700
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$700,000
Question 2
The coefficient of correlation
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is the square of the coefficient of determination
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is the square root of the coefficient of determination
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is the same as r-square
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can never be negative