Measures Of Central Tendency
ICSE · Class 11 · Economics
All formulas from Measures Of Central Tendency in ICSE Class 11 Economics. Key equations, constants, and identities for board exam preparation.
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Formulas
2. Arithmetic Mean
X̄ = ΣX / N
X̄ = A + Σd / N
X̄ = A + (Σd' / N) × C
x̄ = ΣfX / Σf
X̄ = A + (Σfd / N)
3. Median
M = Size of (N + 1)/2 th item
M = L1 + (i / f)(m - c)
M = L2 - (i / f)(m - c)
4. Mode
Z = L1 + ((f1 - f0) / (2f1 - f0 - f2)) × i
Z = L1 + (Δ1 / (Δ1 + Δ2)) × i
Z = 3M - 2X̄
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