Question: Prediction? (a) Use the regression equation in the previous exercise to predict the weight of the soap aft er 30 days. Whats wrong with using

Prediction?

(a) Use the regression equation in the previous exercise to predict the weight of the soap aft er 30 days. What’s wrong with using the regression line to predict weight aft er 30 days?

(b) For these data, r2 0.996. Explain what this value means.

(c) Make a residual plot for these data. Is a linear model appropriate in this case?

Explain.

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