Refer to Exercise 2.124. A team of civil engineers used simple linear regression analysis to model the ratio of repair to replacement cost of commercial pipe as a function of the pipe's diameter. (IHS Journal of Hydraulic Engineering, September 2012.)
a. In this study, identify the dependent and independent variables.
b. Explain why a probabilistic model is more appropriate than a deterministic model.
c. Write the equation of the straight-line, probabilistic model.