The following partial minitab printout of a regression analysis where x is the number of calories per serving and y is the number of grams of sugar per serving for a random sample of high-fiber cereals. (Source: Consumer Reports)
The regression equation is
Sugar = 0.9 + 0.0821 Calories
Predictor Coef SE Coef T P
Constant 0.93 18.93 0.05 0.962
Calories 0.08214 0.09608 0.85 0.413
S = 4.15116 R-Sq = 6.8% R-Sq(adj) = 0.0%
Using alpha = 0.05 answer the questions below:
Is there reason to believe ther eis a lack of fit? enter yes or no.
Is the equation useful for predicting grams of sugar per serving given calories per serving?