| Subject | English | Icelandic |
| math. | asymptotic relative efficiency | asymptotic hlutfallsleg hagkvæmni |
| math. | relative efficiency of a test | nýtni |
| math. | relative efficiency of a test | hlutfallsleg hagkvæmni (af próf) |
| math. | relative efficiency of a sample design | hlutfallsleg nýting (sýnishorn hönnun) |