In problem 11 in chapter 4, the r-squared from estimating the model log(salary) = β0 + β1 log(sales) + β2 log(mktval) + β3profmarg+ β4ceoten + β5comten + u, using the data in ceosal2.csv, was r2 = .353 (n = 177). when ceoten2 and comten2 are added, r2 = .375. is there evidence of functional form misspecification in this model?

Statistical process control charts: a. indicate to the operator the true quality of material leaving the process. b. display upper and lower limits for process variables or attributes and signal when a process is no longer in control. c. indicate to the process operator the average outgoing quality of each lot. d. display the measurements on every item being produced. e. are a graphic way of classifying problems by their level of importance, often referred to as the 80-20 rule.