1. Using the time-series data on retail sales (Y) and disposable income (X) of a country in Table 1 calculate the following: (a) The ex post forecasts (2006-2010) for the naive, three-period moving average, trend, and causal models. (b) The MAE, MAPE, MSE, and RMSE for the ex post period, 2006-2010. (c) Is your choice of the "best" model for the ex post period different from the decision that was made when evaluating over the estimation period? Discuss.

1. Using the time-series data on retail sales (Y0) and disposable income (X1) of a country in Table I calculate the following: (a) The ex post forecasts (2006-2010) for the naive, three-period moving average, trend, and causal models. (b) The MAE, MAPE, MSE, and RMSE for the pout period, 2006-2010. (c) Is your choice of the "best" model for the ex post period different from the decision that was made when evaluating over the estimation period? Discuss. the time-series data on retail sales (Yi) and disposable income (Xt) of a country 1 calculate the following: (a) The ex post forecasts (2006-2010) for the naive, three-period moving average, trend, and causal models. (b) The MAE, MAPE, MSE, and RMSE for the ex post period, 2006-2010. (c) Is your choice of the "best" model for the ex post period different from the decision that was made when evaluating over the estimation period? Discuss. TABLE 1 Historical data for retail sales and disposable personal income (billions of dollars) of a country 1. Using the time-series data on retail sales (Y0) and disposable income (X1) of a country in Table I calculate the following: (a) The ex post forecasts (2006-2010) for the naive, three-period moving average, trend, and causal models. (b) The MAE, MAPE, MSE, and RMSE for the pout period, 2006-2010. (c) Is your choice of the "best" model for the ex post period different from the decision that was made when evaluating over the estimation period? Discuss. the time-series data on retail sales (Yi) and disposable income (Xt) of a country 1 calculate the following: (a) The ex post forecasts (2006-2010) for the naive, three-period moving average, trend, and causal models. (b) The MAE, MAPE, MSE, and RMSE for the ex post period, 2006-2010. (c) Is your choice of the "best" model for the ex post period different from the decision that was made when evaluating over the estimation period? Discuss. TABLE 1 Historical data for retail sales and disposable personal income (billions of dollars) of a country