| No | Description | Difficulty | Syllabus | Level | |
|---|---|---|---|---|---|
| 1 | 4-quarter average with seasonal effect for additive model with blank; NI | Easy | Undergraduate | Foundation | Related material |
| 2 | 4-quarter average with seasonal effect for additive model; NI | Hard | Undergraduate | Foundation | Related material |
| 3 | 4-quarter average with seasonal effect for multiplicative model with blank; NI | Easy | Undergraduate | Foundation | Related material |
| 4 | 4-quarter average with seasonal effect for multiplicative model; NI | Hard | Undergraduate | Foundation | Related material |
| 5 | corrected seasonal variation calculation for additive model; NI | Hard | Undergraduate | Foundation | Related material |
| 6 | corrected seasonal variation calculation for multiplicative model; NI | Hard | Undergraduate | Foundation | Related material |