Education Quick Reference
Quick reference formulas for education.
| Key | formula |
|---|---|
| Basic formula | A = π × r² |
| Convert C to F | F = (C × 9/5) + 32 |
| Convert F to C | C = (F − 32) × 5/9 |
| Pythagoras | c² = a² + b² |
| BMI | kg / m² |
| Tip | 20% of pre-tax = tip amount |
| Compound interest | A = P(1 + r/n)^(nt) |
| Square root | √(x²) = |x| |
| Slope | m = (y2−y1)/(x2−x1) |
| Mean | μ = Σx / n |
| Median | middle value when sorted |
| Mode | most frequent value |
| Range | max − min |
| Variance | σ² = Σ(x − μ)² / n |
| Standard deviation | σ = √(variance) |
| Z-score | z = (x − μ) / σ |
| Confidence interval | μ ± z × (σ/√n) |
| P-value | probability under null hypothesis |
| Effect size | Cohen d = (μ₁ − μ₂) / σ |
| Pearson r | Σ((x−x̄)(y−ȳ)) / √(Σ(x−x̄)² × Σ(y−ȳ)²) |
| Log2 | log₂(x) = ln(x)/ln(2) |
About this lookup
- What is this?
- Education Quick Reference. Quick reference formulas for education.
- How many entries?
- 21 entries.