🧮 Formula sheet
- 1.Arithmetic Mean = Σx / n
- 2.Median (grouped) = L + [(n/2 − cf)/f] × h
- 3.SD = √[Σ(x − x̄)² / n]
- 4.Variance = SD²
- 5.Coefficient of Variation = (SD / Mean) × 100
- 6.GM = (x₁ · x₂ · ... · xₙ)^(1/n)
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