Consider a study designed to estimate the linear relationship between the percentage of jobs outsourced to another country by a U.S. company and the size (number of employees) of the company. In particular, the researchers want to predict percentage of jobs outsourced by a company with 500 employees.

a. In this study, identify the experimental unit and 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.