1. Data on demand over the last few years are available as follows Time Period 7 years demand 7 6 years demand 28 5 years demand 21 4 years demand 42, 3 years demand 35, 2 years demand 56, last year demand 49. What is this years forecast using trend-adjusted (double)smoothing with alpha = .2 and beta = 1 if the forecast for last year was 56, the forecast for two years ago was 46, and the trend estimate for last years forecast was 7?
Data on the last three years of demand are available as follows Year three spring 18, summer 10, fall 26, winter 42 Two years ago spring 26, summer 18, fall 34, winter 50, last year spring 34, summer 26, fall 42, winter 58 what is the springs seasonal relative?