Based on annual truck rentals over the years, a rental firm has developed the quadratic trend equation ŷ = 450 + 20x + 7.2x2, with x = 1 for 2005. Forecast y for 2013; for 2015.
Answer to relevant QuestionsWhen exponential smoothing is used in fitting a curve to a time series, the approach is slightly different from its application to forecasting. Compare the appropriate formulas and point out how they differ. The quarterly seasonal indexes for a firm’s electricity consumption are 115, 92, 81, and 112 for quarters I–IV. It has been forecast that electricity consumption will be 850,000 kilowatt-hours during 2014. Forecast ...The least-squares regression equation ŷ = 98.1 + 5.0t has been fitted to the shipment data given here. Calculate the Durbin-Watson d statistic and test for positive autocorrelation of the residuals at the 0.05 level of ...Over the past 20 years, inventory carrying costs for a large tire manufacturing facility have been as shown. Data are in thousands of dollars. Construct a first-order autoregressive forecasting equation for these data, ...SUBWAY has grown to include more than 31,000 restaurants worldwide since they opened their first one in 1965. The accompanying data show the number of SUBWAY restaurants worldwide from 1985 through 2002. Fit a quadratic ...
Post your question