The data file Food Prices shows an index of food prices, seasonally adjusted, over a period of 14 months in the United States. Use the Holt-Winters method with smoothing constants α = 0.5 and β = 0.5 to obtain forecasts for the next 3 months.
Answer to relevant QuestionsThe data file Profit Margins shows percentages of profit margins of a corporation over a period of 11 years. Obtain forecasts for the next 2 years, using the Holt-Winters method with smoothing constants α = 0.4 and β = ...Using the data file Housing Starts, estimate autoregressive models of orders 1 through 4. Use the method of this section to test the hypothesis that the order of the autoregression is p – 1 against the alternative that the ...Explain the statement that a time series can be viewed as being made up of a number of components. Provide examples of business and economic time series for which you would expect particular components to be important. Using the data in the file Macro2010 develop an autoregressive model for fixed investment. First, use the data for the period 1965, first quarter, through 2000, fourth quarter, to forecast for the quarters in years ...Refer to the data of Exercise 17.3. If a total sample of 160 households is to be taken, determine how many of these should be from subdivision 1 under each of the following schemes. a. Proportional allocation b. Optimum ...
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