1. Under which of the following conditions would you suggest that a double exponential smoothing model should be used instead of a single exponential smoothing model?
(A) When there are two main time-series variables involved in the forecast application
(B) When the data exhibit only random variation
(C) When the time-series data exhibit a trend
(D) When the data set is extremely uneven

答案：登入後查看
統計： 尚無統計資料