Reference no: EM131008086
1. OPEC production, part 2. Using the data from Exercise 54, develop and compare the following models.
a) Fit an appropriate autoregressive model by testing for the significance of each autoregressive term.
b) Obtain a forecast for March 2007.
c) Compare your forecast for March to the actual value (by computing APE) and to the forecasts obtained in Exercise 54.
d) Recommend an appropriate model for forecasting this time series.
2. Interest rates, part 2. Consider the average annual in- terest rates we saw in Exercise 34. That exercise showed a linear model fit to these data.
a) Fit a linear trend model to this series but do not use the values for 2005 and 2006.
b) Fit an exponential trend model to this series but do not use the values for 2005 and 2006.
c) Use both models to forecast the average interest rate for 2005 and 2006. Which model produces better forecasts?
d) What other time series components (besides trend) are likely present in this series?
Calculate the total initial momentum of the two car system
: Calculate the total initial momentum of the two car system with uncertainty. Calculate the total final momentum of the two car system with uncertainty. Is momentum conserved? (Hint: Don't just answer 'yes' or 'no'.
|
Identify the experimental units
: 1. For the following experiment, identify the experimental units, the treatments, the response, and the random assignment.
|
Sample of returned registration cards
: 1. For the following observational studies, indicate whether they are prospective or retrospective. a) A company looked at a sample of returned registration cards to estimate the income level of households that purchased their product.
|
Portions of the financial statements for myriad products
: Prepare the cash flows from operating activities section of the statement of cash flows for Myriad Products Company using the direct method.
|
Significance of autoregressive term
: 1. OPEC production, part 2. Using the data from Exercise 54, develop and compare the following models. a) Fit an appropriate autoregressive model by testing for the significance of each autoregressive term.
|
The previous exercise for clear transmissions company
: Prepare the cash flows from operating activities section of the statement of cash flows for Clear Transmissions Company using the indirect method.
|
Differences between distributions majors for women and men
: Career plans of young women and men. A study of the career plans of young women and men sent, Describe the differences between the distributions of majors for women and men with percents, with a graph, and in words.
|
Compute the absolute percent error
: What does the intercept 173 represent in this trend line? What does the slope represent? The R2 for this trend line is 97%. Use this linear model to obtain a forecast for the CPI in April 2007. The actual CPI in April 2007 was 206.686. Compute the ab..
|
Determining the autoregressive model
: Suppose an autoregressive model is used for data in which quarterly sales in 2005 were: 1.9, 1.7, 2.2, and 2.3 ($Billion).
|