Suppose we are interested in the relationship between the glucose concentration
ID: 3392146 • Letter: S
Question
Suppose we are interested in the relationship between the glucose concentration y (in g/L) and the fermentation time x (in days) for a particular blend of malt liquor. The glucose concentration was measured over n = 8 days and the following polynomial regression results of the data were reported.
yˆ = 84.482115.8750x +1.7679x 2 SSResid = 61.7679 SSTotal = 586.8750
d. Compute the value of the adjusted R2 statistic. Compare it to the value of R2 ?
e. Test the utility of this quadratic regression model, and show all six steps.
f. Test whether or not the x 2 term is important (useful) in the aforementioned model. [Note that sb2 = 0.2712 .]
Explanation / Answer
R^2 = 1 - 61.7679 / 586.8750 = 0.8947
R^2 adjusted = 0.5 * 0.8947 = 0.4474
for the other literals
I can gladly help you but you should post it in a new question