If S_t_-_s₊_k is the seasonal factor for period t - s + k and s is the number of periods in a season,the seasonal additive model can be written as ________. A)F_t₊_k = a_t + S_t_-_s₊_k B)F_t = a_t + S_t_-_s₊_k C)F_t = a_{t + k} + S_t_-_s₊_k D)F_t₊_k = (a_t + k)+ S_t_-_s₊_k

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Quizplus · Accepted Answer

The seasonal additive model is F_t = a_t + S_t, where F_t is the forecast for period t, a_t is the trend component for period t, and S_t is the seasonal component for period t. The seasonal component is assumed to repeat every s periods, so S_t = S_t-s. The seasonal factor for period t - s + k is S_t-s+k, so the seasonal additive model can be written as F_t = a_t + S_t-s+k.

If St - s + k Is the Seasonal Factor

If S_t_-_s₊_k Is the Seasonal Factor