Prove the equivalence of equations 12–11 and 12–12.
Answer to relevant QuestionsIn 1987, the base year was changed to [1982 = 100]. Change the base for all the figures in Table. Discuss and compare all the forecasting methods presented in this chapter. What are the relative strengths and weaknesses of each method? Under what conditions would you use any of the methods? The quarterly sales of a large manufacturer of spare parts for automobiles are tabulated below. Since the sales are in millions of dollars, forecast errors can be costly. The company wants to forecast the sales as accurately ...Use the data to create an x̄ chart to test whether the process mean is under control. 2.5, 2.66, 2.8, 2.3, 2.5, 2.33, 2.41, 2.88, 2.54, 2.11, 2.26, 2.3, 2.41, 2.44, 2.17, 2.52, 2.55, 2.38, 2.89, 2.9, 2.11, 2.12, 2.13, 2.16 Discuss what is meant by quality control and quality improvement.
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