The data file Quarterly Sales shows quarterly sales of a corporation over a period of 6 years.

Question:

The data file Quarterly Sales shows quarterly sales of a over a period of 6 years. Use the Holt-Winters seasonal method to obtain forecasts of sales up to eight quarters ahead. Employ smoothing constants α = 0.5, β = 0.6, and γ = 0.7. Graph the data and the forecasts. Corporation
A Corporation is a legal form of business that is separate from its owner. In other words, a corporation is a business or organization formed by a group of people, and its right and liabilities separate from those of the individuals involved. It may...