Question 13.68

13.68 Mexican population density.

Consider a time series on the annual population density (number of people per square kilometer) in Mexico from 2001 through 2013.37

mexico

  1. Make a time plot. Describe the movement of the data over time.
  2. Fit a linear trend model to the data series and report the estimated model.
  3. Obtain the residuals for the trend model fit and calculate MAD, MSE, and MAPE (see Exercises 13.47, 13.48, and 13.49, page 694).
  4. Make a time plot of the residuals. Are the residuals suggesting any concerns about the linear trend model? Explain.