Question: Modify the linregr function in Fig. 14.15 so that it (a) Computes and returns the standard error of the estimate, and (b) Uses the subplot

Modify the linregr function in Fig. 14.15 so that it
(a) Computes and returns the standard error of the estimate, and 

(b) Uses the subplot function to also display a plot of the residuals (the predicted minus the measured y) versus x.

3.5 3 2.5 2 1.5 1 1 1.2 O 1.4 1.6 1.8

3.5 3 2.5 2 1.5 1 1 1.2 O 1.4 1.6 1.8 2

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