Reference no: EM13995486
1. The actual number of help-wanted ads in a local newspaper was 1682, 1963, 2451, and 3205 for quarters I through IV, respectively, of the preceding year. The cor- responding deseasonalized values are 2320, 2362, 2205, and 2414, respectively. Based on this information, what seasonal index is associated with each quarter?
2. The trend equation yˆ 5 2050 1 12x has been developed for the number of vehicles using the ferry ser- vice at a national seashore each year. (The years have been coded so that 1997 corresponds to x 5 1.) If the seasonal indexes for quarters I through IV are 55.0, 130.0, 145.0, and 70.0, respectively, estimate the usage volume for each quarter of 2014.
3. The trend equation yˆ 5 150 1 12x 1 0.01x2 has been developed for annual unit sales of a filtering system component used by municipal water authorities. The years have been coded so that 2001 corresponds to x 5 1. If the seasonal indexes for quarters I through IV are 85.0, 110.0, 125.0, and 80.0, respectively, estimate the unit sales for each quarter of 2015.
4. The U.S. Energy Information Administration reports the following prices for regular unleaded gasoline in Germany from 2003 through 2008. Source: U.S. Energy Information Administration, Annual Energy Review 2008, p. 321.
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What is the value of g
: If you measure the changes to be separated by a distance d, what is the value of g? Express you answer in terms of εo, m, d, the angles, and g, the acceleration due m gravity near the surface of the earth.
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Calculate the mean absolute deviation
: Construct a first- order autoregressive forecasting equation for these data, calculate the mean absolute deviation (MAD) for the fit of the forecast values to the actual values, then use the equa- tion to forecast the PPI for 2008. Source: Bureau o..
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Calculate the change in internal energy of the system
: Calculate the change in internal (thermal) energy of the system. If the internal (thermal) energy change is nonzero. be sure to indicate whether this energy change is positive or negative.
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Linear trend equation and forecast the number
: a. Combining the quarterly bookings for each year, fit a linear trend equation and forecast the number of bookings for 2013. b. Determine the seasonal indexes and break the 2013 forecast in part (a) into its quarterly components.
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Annual unit sales of a filtering system component
: The trend equation yˆ 5 150 1 12x 1 0.01x2 has been developed for annual unit sales of a filtering system component used by municipal water authorities. The years have been coded so that 2001 corresponds to x 5 1. If the seasonal indexes for quart..
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Four-period centered moving averages
: Construct three-period and four-period centered moving averages for the quarterly J. C. Penney sales in Exercise 18.67. Are there any other retailing companies for whom a four-period moving average might have such a great effect on smoothing quart..
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Smoothness of the ?tted curve
: Using the constant a 5 0.3, ?t an exponentially smoothed curve to the original time series. Repeat part (c) using a 5 0.7. How has the new value for the constant affected the smoothness of the ?tted curve?
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Smoothing and the smoothing constant
: The U.S. trade deficit with Canada (billions of dollars) from 2000 through 2007 is reported as shown in the table. Using exponential smoothing and the smoothing constant a = 0.7, what deficit would have been forecast for 2008? Source: World Almanac..
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Conduct research to identify a company that operates
: Conduct research to identify a company that operates in two countries located in two different geographical regions. After evaluating the assigned readings and the research literature related to this module
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