Section A: Multiple choice questions @ 1 mark each 1. For the trend equation Tt = 70 + 20t and if the origin is February 1990 and the units of t are monthly, then changing the origin to first quarter of 1991 and the units of t to quarterly, will change the trend equation to: a) T. = 310 - 60t c) Tt = 310 + 60t b ) Te = 310 + ( 2 )t d) Tt = 310 + 80t 2. The stationary time series has a zero: a) trend effects only c) cyclical effects only b) seasonal effects only d) trend, seasonal, and cyclical effects. 3. For a semiannual seasonal series, the seasonal effect S5 is the equal to: a ) S1 C ) 56 b ) S2 d) Sg 4. A value of a smoothing constant for double exponential smoothing, asEs = 0.4, is equivalent to smoothing constant for simple exponential smoothing, aDES , approximately equal to: a) 0.163 c) 0.51 b) 0.105 d) 0.225