Freight car loading over a 10-week period at a busy port are as follows
Week 1 2 3 4 5 6 7 8 9 10
Number 220 245 280 275 300 310 350 360 400 420
a) Forecast week 11, by using exponential soothing, use a(alpha) = 0.3, forecast of week6 = 320.
b) Develop the trend equation to forecast week 20 and 25
c) The manager intends to install new equipment when the volume exceeds 800 loadings per week.
Assuming the current trend continues, the loading volume will reach that level in approximately what week?
a) Compute MAD and MSE for the trend equation?