A manufacturer of mole and gopher poison has experienced the following monthly demand for an environmentally sound pesticide poison.
Month Actual demand (in cases)
February 640
March 840
April 770
May 950
June 875
a. Using a Average method, what would the forecast have been for July?
b. What would the unweighted three-month simple moving average have been for July?
c. Which forecasting method would you recommend? Why?