In: Statistics and Probability
Consider the following time series data.
Excel File: data17-35.xls
Quarter | Year 1 | Year 2 | Year 3 |
1 | 4 | 6 | 7 |
2 | 2 | 3 | 6 |
3 | 3 | 5 | 6 |
4 | 5 | 7 | 8 |
b. Show the four-quarter and centered moving average values for this time series (to 3 decimals if necessary).
Year | Quarter | Time Series Value | Four-Quarter Moving Average | Centered Moving Average |
1 | 1 | 4 | ||
2 | 2 | |||
3.25 | ||||
3 | 3 | ________ | ||
4 | ||||
4 | 5 | _______ | ||
_________ | ||||
2 | 1 | 6 | _________ | |
4.75 | ||||
2 | 3 | 5 | ||
5.25 | ||||
3 | 5 | 5.375 | ||
5.5 | ||||
4 | 7 | _______ | ||
_______ | ||||
3 | 1 | 7 | _______ | |
_______ | ||||
2 | 6 | ______ | ||
________ | ||||
3 | 6 | |||
4 | 8 |
c. Compute seasonal indexes and adjusted seasonal indexes for the four quarters (to 3 decimals).
Quarter | Seasonal Index |
Adjusted Seasonal Index |
1 | ||
2 | ||
3 | ||
4 | ||
Total |