The monthly sales for Yazici Batteries, Inc., were as follows
a) Plot the monthly sales data.
b) Forecast January sales using each of the following:
i) Naive method.
ii) A 3-month moving average.
iii) A 6-month weighted average using .1, .1, .1, .2, .2, and .3, with the heaviest weights applied to the most recent months.
iv) Exponential smoothing using an a = .3 and a September forecast of 18. v) A trend projection.
c) With the data given, which method would allow you to forecast next March’s sales?