1. Which of the following is not a component in the time series decomposition model?
trend
seasonal variation
irregular variation
business indicators
cyclical variation
2. Which of the following best describes the general approach to forecasting when applying time series decomposition in multiplicative form?
Y=T+S+C+I
Y=T*S*C*I
Y=T*S*C
Y=(T+C)*S
NONE OF THE ABOVE