Which one of the following statements is a similarity between how time series decomposition and Winters exponential smoothing deal with seasonality.

Multiple Choice

In either model, the sum of the seasonal indices will equal a portion of the number of periods represented per year in data based on the period reviewed.

Both models deal with seasonality in a non-multiplicative manner.

Each method gives you an index of how each period compares to the average period for the year.

In both models, an index above one indicates a low period while an index below one indicates a high period.