Scott Armstrong the managing editor of Your Horoscope magazine requests to develop a forecasting system for scheduled newsstand sales in order to schedule press runs and Sales in thousands of copies for the first seven months of publication were

Year Month Sales
2012 August 70
September 75
October 85
November 82
December 90
2013 January 82
February 88

Scott doesn't believe there is a seasonal pattern. He is since three different forecasting models- three-period moving average, simple exponential smoothing with and time series regression (that is trend projection). Regulate the best forecasting model among the above three methods and develop a forecast for March 2013. Utilized the first four months as the warm-up sample period and the remaining months as the forecasting sample period. The principles of measuring forecast accuracy to be used are Bias, MAD, MSE and MAPE