SCMS 7110 Exam 2 Solutions
Question 1
4 / 4 points
The overall upward or downward pattern of the data in an annual time series will be contained in the ____________ component.
trend
cyclical
irregular
seasonal
Question 2
4 / 4 points
When using the exponentially weighted moving average for purposes of forecasting rather than smoothing,
the previous smoothed value becomes the forecast.
the current smoothed value becomes the forecast.
the next smoothed value becomes the forecast.
None of the above.
Question 3
4 / 4 points
The following is the list of MAD statistics for each of the models you have estimated from time-series data:
Model
MAD
Linear Trend
1.38
Quadratic Trend
1.22
Exponential Trend
1.39
AR(2)
0.71
Based on the MAD criterion, the most appropriate model is
linear trend.
quadradic trend.
exponential trend.
AR(2).
Question 4
4 / 4 points
The following table contains the number of complaints received in a department store for the first 6 months of last year.
Month Complaints Jan 36 Feb 45 Mar 81 Apr 108 May 144
Referring to the above table, if a three-term moving average is used to smooth this series, what would be the second calculated term?
36
40.5
54
78
Question 5
4 / 4 points
TABLE 16-4 Given below are EXCEL outputs for various estimated autoregressive models for Coca-Cola's real operating revenues (in billions of dollars) from 1975 to 1998. From the data, we also know that the real operating revenues for 1996, 1997, and 1998 are 11.7909, 11.7757 and, 11.5537, respectively.
4 / 4 points
The overall upward or downward pattern of the data in an annual time series will be contained in the ____________ component.
trend
cyclical
irregular
seasonal
Question 2
4 / 4 points
When using the exponentially weighted moving average for purposes of forecasting rather than smoothing,
the previous smoothed value becomes the forecast.
the current smoothed value becomes the forecast.
the next smoothed value becomes the forecast.
None of the above.
Question 3
4 / 4 points
The following is the list of MAD statistics for each of the models you have estimated from time-series data:
Model
MAD
Linear Trend
1.38
Quadratic Trend
1.22
Exponential Trend
1.39
AR(2)
0.71
Based on the MAD criterion, the most appropriate model is
linear trend.
quadradic trend.
exponential trend.
AR(2).
Question 4
4 / 4 points
The following table contains the number of complaints received in a department store for the first 6 months of last year.
Month Complaints Jan 36 Feb 45 Mar 81 Apr 108 May 144
Referring to the above table, if a three-term moving average is used to smooth this series, what would be the second calculated term?
36
40.5
54
78
Question 5
4 / 4 points
TABLE 16-4 Given below are EXCEL outputs for various estimated autoregressive models for Coca-Cola's real operating revenues (in billions of dollars) from 1975 to 1998. From the data, we also know that the real operating revenues for 1996, 1997, and 1998 are 11.7909, 11.7757 and, 11.5537, respectively.