| No | Description | Difficulty | Syllabus | Level | |
|---|---|---|---|---|---|
| 1 | Find P(Z less than -zupper); NI | Intermediate | A-level | S1 | Related material |
| 2 | Find P(Z less than zupper); NI | Easy | A-level | S1 | Related material |
| 3 | Find P(Z more than -zupper); NI | Intermediate | A-level | S1 | Related material |
| 4 | Find P(Z more than zupper); NI | Intermediate | A-level | S1 | Related material |