# Question

Refer to Exercise 11.9.

a. Find the least- squares estimates of the slope and intercept in the output.

b. What does the sign of the slope indicate about the relation between the speed of the drill and bit lifetime?

c. Compute the residual standard deviation. What does this value indicate about the fitted regression line?

In exercise

a. Find the least- squares estimates of the slope and intercept in the output.

b. What does the sign of the slope indicate about the relation between the speed of the drill and bit lifetime?

c. Compute the residual standard deviation. What does this value indicate about the fitted regression line?

In exercise

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