Refer to the data from Exercise 12.11. Recall that a model was fit to relate systolic blood pressure to the age and weight of infants. The researcher wants to be able to predict systolic blood pressure from the fitted model.
a. Provide an estimate for the mean systolic blood pressure for an infant of age 4 days weighing 3 kg.
b. Provide a 95% confidence interval for the mean systolic blood pressure for an infant of age 4 days weighing 3 kg.
In exercise

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