Question: Reconsider the data from Problem 7.21. Suppose that it is important to predict the response at the points x = 1750 and x = 1775.

Reconsider the data from Problem 7.21. Suppose that it is important to predict the response at the points x = 1750 and x = 1775.

a. Find the predicted response at these points and the 95% prediction intervals for the future observed response at these points.

b. Suppose that a fi rst - order model is also being considered. Fit this model and fi nd the predicted response at these points. Calculate the 95% prediction intervals for the future observed response at these points. Does this give any insight about which model should be preferred?

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