Final answer:
To compute seasonal relatives using the sa method, identify the seasonal pattern, calculate the average value for each season, and divide each observation by its corresponding season average.
Step-by-step explanation:
Seasonal relatives are used to measure the variation of a time series at different times of the year. They are calculated by dividing each observation by the average value for its corresponding season. To compute seasonal relatives using the sa method, follow these steps:
- Identify the seasonal pattern in the data.
- Calculate the average value for each season.
- Divide each observation by the average value for its corresponding season.
For example, if you have quarterly sales data, you would calculate the average sales for each quarter and then divide each actual sales value by the average for its corresponding quarter.