Question: Compare the two best models that you have found in Problem 10.21 in terms of C p by calculating the confi dence intervals on the

Compare the two best models that you have found in Problem 10.21 in terms of C p by calculating the confi dence intervals on the mean of the thrust response for all points in the original data set. Based on a comparison of these confi dence intervals, which model would you prefer? Now calculate the PRESS statistic for these models. Which model would PRESS indicate is likely to be the best for predicting new observations on thrust?

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