These mean and standard deviation values are indicative, not official
The Department of Examinations works out the Z-score itself and prints it on your result sheet; it does not publish the subject mean and standard deviation behind it. The presets below are typical figures for each stream, useful for estimating before results or for seeing what a mark is worth — but a Z-score built from them is an estimate, not your official one. Replace any field with the real figure if you have it.
Already have your Z-score? Check it against the 2025/2026 university cut-offs.
Your Z-score
1.3611
The average of your three subject z-scores
Subject by subject
Combined Mathematics
72 against a mean of 45, +27 marks
+1.3500Physics
65 against a mean of 42, +23 marks
+1.5333Chemistry
58 against a mean of 40, +18 marks
+1.2000
Your strongest subject by z-score is Physics, which is not necessarily your highest mark — a lower mark on a harder paper can be worth more.
How places are allocated
Every course splits its intake three ways, which is why the Z-score needed differs by district.
- 40%
All-island merit
Ranked on Z-score alone, across every district.
- 55%
District quota
Allocated to the 25 districts in proportion to population, then ranked within each district.
- 5%
Educationally disadvantaged districts
Reserved for districts identified as educationally disadvantaged, allocated on population.