Time-Series Forecasting with Exponential Smoothing Uses the Following Formula:` $S _ { t } = w Y _ { t } + ( 1 - w ) S _ { t - 1 }$

Multiple Choice

Time-series forecasting with exponential smoothing uses the following formula:` $S _ { t } = w Y _ { t } + ( 1 - w ) S _ { t - 1 }$ . where $S _ { t }$ is the exponentially smoothed time series at time t, $y _ { t }$ is the value of the time series at time t, and w is the smoothing constant. The forecast value at time t + 1, where w = 0.3, is given by:

A) Ft+1 = 0.3yt+1 + 0.7St+1.
B) Ft+1 = 0.3yt + 0.7St-1.
C) Ft+1 = 0.3yt + 0.7St.
D) Ft+1 = 0.3yt-1 + 0.7St.