# Question

Refer to Exercise 13.72. Suppose you average the y- values for each of the unknowns and fit the ys in the linear regression model of Exercise 13.72.

a. Do your linear regression lines change for each of the laboratories?

b. Will predictions of x change based on these new regression lines for the four laboratories? Explain.

In exercise

a. Do your linear regression lines change for each of the laboratories?

b. Will predictions of x change based on these new regression lines for the four laboratories? Explain.

In exercise

## Answer to relevant Questions

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