Question 13.69

13.69 Mexican population density.

Continue the analysis of the annual population density in Mexico.

mexico

  1. Fit a trend model based on a linear term and a quadratic term . Report the estimated model.

    709

  2. Obtain the residuals for the quadratic trend model fit and calculate MAD, MSE, and MAPE (see Exercises 13.47, 13.48, and 13.49, page 694). How do these measures compare with the linear trend fit of the previous exercise?
  3. Forecast the population density of Mexico for year 2014.

13.69

(a) . (b) . All three measures are much smaller for the quadratic model than in the linear model. (c) 63.726.