Question: Using the data in Exercise 6 of Chapter 6, verify that the R function lsfitci returns a 0.95 confidence interval for the slope (when predicting

Using the data in Exercise 6 of Chapter 6, verify that the R function lsfitci returns a 0.95 confidence interval for the slope (when predicting cancer rates given solar radiation) of (−0.049, −0.25). The classic 0.95 confidence interval based on Equation (6.8) is

(−0.047, −0.24). What does this suggest about the conventionalmethod?

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