How many steps are involved in decision making process? What is the importance of each step? Why is regression analysis also called as least squares regression? What is the relationship between SST, SSR and SSE? What does ANOVA stand for? How is it computed? What are the different methods under each of the forecasting technique: (1) Qualitative models, (2) Time-series methods, and (3) Causal methods How and where are they used? Must be answered in 400 words.