Reference no: EM131415919
ARIMA Models
INSTRUCTIONS: Use MINITAB 17 to complete the following questions. You are to work independently on this assignment. All data sets for this assignment have been provided. Please submit your completed assignment that includes relevant MINITAB output and comments (make sure to comment on your results when asked) as ONE WORD document .
1. Use the data set WeeklyRestaurantSales.MTW. These data are weekly sales at a small restaurant.
(a) Prepare a time series plot, ACF and PACF for these data. Is there evidence to suggest that the data should be differenced? Explain.
(b) Prepare the ACF and PACF for the first differenced data. Identify one plausible ARIMA model based on these plots. Justify your selection.
(c) Fit an ARIMA (1, 1, 0) to these data and show the ACF and PACF for the residuals. Is this model adequate based on the sampling statistics? Explain.
(d) Fit an ARIMA (0, 1, 1) to these data and show the ACF and PACF for the residuals. Is this model adequate based on the sampling statistics? Explain.
(e) Fit an ARIMA (1, 1, 1) to these data and show the ACF and PACF for the residuals. Is this model adequate based on the sampling statistics? Explain.
(f) Which of the three models fit above is the best? Justify your choice!
2. Use the data set BASIRONQ.MTWprovided with this assignment. These data show basic quarterly iron production in Australia (thousands tons) from March 1956 to September 1994. (Source: https://data.is/TSDLdemo).
(a) Prepare a time series plot, ACF and PACF for these data. Is there evidence to suggest that the data should be differenced? Explain.
(b) Prepare the ACF and PACF for the first differenced data. Explain why this appears to be more of an AR process than an MA process.
(c) Fit an ARIMA (1, 1, 0) to these data and show the ACF and PACF for the residuals. Is this model adequate based on the sampling statistics? Explain.
(d) Fit an ARIMA (2, 1, 0) to these data and show the ACF and PACF for the residuals. Is this model adequate based on the sampling statistics? Explain.
(e) Fit an ARIMA (3, 1, 0) to these data and show the ACF and PACF for the residuals. Is this model adequate based on the sampling statistics? Explain.
(f) Which of the three models fit above is the best? Justify your choice!
Attachment:- Minitab.rar
Which is preferred for a system engineering organization
: Relative to the styles of management, what is meant by "Theory X" and "Theory Y?" Which is preferred for a system engineering organization?
|
About key agency and work unit policies-priorities
: Alberto has just been promoted to a managerial position within his company and is now responsible for keeping subordinates informed about key agency and work unit policies, priorities, issues, and trends.
|
Relationship between the carcinogen and the cancer
: Assignment, pick a group 1 carcinogen from the IARC. Find at least five peer-reviewed journal articles that support the relationship between the carcinogen and the cancer that it causes. Some suggested topics might be
|
How might the economists or legislators
: How might the economists or legislators come to the conclusion that there is no unemployment problem? What data or evidence would seem to support this position?
|
Prepare a time series plot
: Prepare a time series plot, ACF and PACF for these data. Is there evidence to suggest that the data should be differenced? Explain.
|
Economy is in the midst of a long recession
: The economy is in the midst of a long recession, and there doesn't appear to be any sign of relief.
|
Ethical issues surrounding internet therapy
: These summaries must not be merely one summary after another with no meaningful connections between them, but rather the paper should integrate and demonstrate clearly how the summaries are logically related to one another in a coherent and well-a..
|
Identify the major organizational interfaces
: Identify the major organizational interfaces between system engineering and other major activities within the company.
|
What factors limit women career development
: What factors limit women's career development? Include in your discussion the influence of gender bias in school, hiring and promotion discrimination, and ethnicity as a factor that limits career development
|