The data set below shows a sample of salaries for 39 engineers employed by the Solnar Company along with each engineer's years of experience.
(a) Construct a scatter plot using Salary as the response variable and Years as the explanatory variable. Describe the shape of the scatter plot. Does it appear that a nonlinear model would be appropriate? Explain.
(b) Run the regression with Salary as the response variable and Years and YearsSq as the explanatory variables. Report the R2, Fcalc statistic, and p-value. Is the nonlinear model significant?
(c) Report the p-values for both Years and YearsSq. Are these variables significant predictors? Use 5 .10.