Complete the following worksheet and then use it to calculate the coefficient of determination. ii xixi yiyi yˆy^ (yˆi−y

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Complete the following worksheet and then use it to calculate
the coefficient of determination.
ii
xixi
yiyi
yˆy^
(yˆi−y¯)2y^i−y¯2
(yi−y¯)2yi−y¯2
The coefficient of determination (r2r2) is
According to the regression model, which of the following is the
best estimate together with the 95 percent prediction interval of
paint sales (in thousands of gallons) in a sales region where the
selling price is $12.50?
417.675 ± 2(2.824)
215.550 ± 2(2.824)
417.675 ± 2(15.952)
215.550 ± 2(15.952)
What is the price elasticity of demand at a selling price of
$12.50?
-0.06
-0.57
-0.88