Mathematics A-Level
empirical 68-95-99.7% rule
What empirical 68-95-99.7% rule means in Mathematics A-Level, as defined for WJEC.
Definition of empirical 68-95-99.7% rule
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Reference: WJEC
Approximately 68% of data lie within μ ± σ, 95% within μ ± 2σ, and 99.7% within μ ± 3σ.
Topics that use empirical 68-95-99.7% rule
- Statistical distributions (A2 Unit 4: Applied Mathematics B) (WJEC A-Level)
Related terms
- binomial to Normal approximation
- continuous uniform distribution
- continuous uniform suitability
- distribution selection
- inverse Normal calculations
- model critique
- Normal distribution limitations
- Normal distribution probabilities
Using empirical 68-95-99.7% rule in the exam
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