by using the following 4 forecasting methods. And compute MAD, MSE and RMSE for each of 4 methods. Q1. 8MA Q2. Exponential Smoothing with Alpha =0.8 Q3. Regression Method (Assume that the data do not contain the seasonal factor). (Use Excel Data Analysis for accuracy and time-saving.) Q4. Regression Method (Assume that the data contain the seasonal factor). \begin{tabular}{|c|c|r|} \hline \multicolumn{1}{|c|}{ Q4 } & \multicolumn{2}{c|}{ Seasonal } \\ \hline Year & Quarter & Demand \\ \hline 3 years ago & 1 & 38 \\ \hline & 2 & 84 \\ \hline & 3 & 98 \\ \hline & 4 & 66 \\ \hline years ago & 1 & 44 \\ \hline & 2 & 80 \\ \hline & 3 & 106 \\ \hline last year & 4 & 62 \\ \hline & 1 & 48 \\ \hline & 2 & 88 \\ \hline & 3 & 124 \\ \hline this year & 4 & 72 \\ \hline & 2 & 54 \\ \hline & 3 & 92 \\ \hline next year & 1 & 148 \\ \hline & 2 & 126 \\ \hline & 3 & \\ \hline & 4 & \\ \hline \end{tabular} CEO John Goodale, at Southern Illinois Power and Light, has been collecting data on demand for electric power in its western subregion over four years. Those data are shnwn in the tahle helnw A. Generate forecasts for each of the 4 quarters for the next year by using the following 4 forecasting methods. And compute MAD, MSE and RMSE for each of 4 methods by using the following 4 forecasting methods. And compute MAD, MSE and RMSE for each of 4 methods. Q1. 8MA Q2. Exponential Smoothing with Alpha =0.8 Q3. Regression Method (Assume that the data do not contain the seasonal factor). (Use Excel Data Analysis for accuracy and time-saving.) Q4. Regression Method (Assume that the data contain the seasonal factor). \begin{tabular}{|c|c|r|} \hline \multicolumn{1}{|c|}{ Q4 } & \multicolumn{2}{c|}{ Seasonal } \\ \hline Year & Quarter & Demand \\ \hline 3 years ago & 1 & 38 \\ \hline & 2 & 84 \\ \hline & 3 & 98 \\ \hline & 4 & 66 \\ \hline years ago & 1 & 44 \\ \hline & 2 & 80 \\ \hline & 3 & 106 \\ \hline last year & 4 & 62 \\ \hline & 1 & 48 \\ \hline & 2 & 88 \\ \hline & 3 & 124 \\ \hline this year & 4 & 72 \\ \hline & 2 & 54 \\ \hline & 3 & 92 \\ \hline next year & 1 & 148 \\ \hline & 2 & 126 \\ \hline & 3 & \\ \hline & 4 & \\ \hline \end{tabular} CEO John Goodale, at Southern Illinois Power and Light, has been collecting data on demand for electric power in its western subregion over four years. Those data are shnwn in the tahle helnw A. Generate forecasts for each of the 4 quarters for the next year by using the following 4 forecasting methods. And compute MAD, MSE and RMSE for each of 4 methods
