The unit sales of a new drug for the first 25 months after its introduction to the marketplace are recorded in the file P12_15.xlsx. Specify one or more promising auto regression models based on autocorrelations of this time series. Estimate each model with the available data. Which model provides the best fit to the data? Use the best auto regression model you found to forecast the sales of this new drug in the 26th month.
Answer to relevant QuestionsThe file P12_02.xlsx contains the weekly sales at a local bookstore for each of the past 25 weeks.a. Specify one or more promising auto regression models based on autocorrelations of this time series. Estimate each model ...The file P12_10.xlsx contains the daily closing prices of Walmart stock during a one-year period. Use the moving average method with a carefully chosen span to forecast this time series for the next three trading days. ...Consider the poverty level data in the file S02_44.xlsx.a. Create a time series chart of the data. Based on what you see, which of the exponential smoothing models do you think should be used for forecasting? Why?b. Use ...Suppose that Winters’ method is used to forecast quarterly U.S. retail sales (in billions of dollars). At the end of the first quarter of 2010, the seasonal indexes are: quarter 1, 0.90; quarter 2, 0.95; quarter 3, 0.95; ...Quarterly sales for a department store over a six-year period are given in the file S12_62.xlsx.a. Use multiple regression to develop an equation that can be used to predict future quarterly sales. b. Letting Yt be the sales ...
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