Historical demand for a product is:
Month Demand
January 12
February 11
March 15
April 12
May 16
June 15
a. Using a weighted moving average with weights of 0.60, 0.30, and 0.10, find the July forecast.
b. Using a simple three-month moving average, find the July forecast.
c. Using single exponential smoothing with alpha = 0.2 and a June forecast = 13, find the July forecast. Make whatever assumptions you wish.
d. Using simple linear regression analysis, calculate the regression equation for the preceding demand data.