Chapter 26 of 27
Formula Sheet
Statistics — Formula Sheet
WBJEE · Mathematics
Free Statistics formula sheet for WBJEE Mathematics 2026 — all important formulas, equations, and constants for quick reference.
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Important formulas and equations from Statistics for WBJEE Mathematics.
Formulas — Statistics
Measures of Dispersion - Range
Range = Maximum value - Minimum valueCoefficient of Range = (Largest - Smallest)/(Largest + Smallest)Mean Deviation
M.D.(x̄) = Σ|xi - x̄|/n (ungrouped data)M.D.(M) = Σ|xi - M|/n (ungrouped data)M.D.(x̄) = Σfi|xi - x̄|/N (grouped data)M.D.(M) = Σfi|xi - M|/N (grouped data)Variance and Standard Deviation
σ² = Σ(xi - x̄)²/n (ungrouped data)σ = √[Σ(xi - x̄)²/n]σ² = Σfi(xi - x̄)²/N (discrete frequency)σ = √[NΣfixi² - (Σfixi)²]/N (shortcut method)σ² = (h²/N²)[NΣfiyi² - (Σfiyi)²] (step deviation)Combined Statistics
x̄ = (n₁x̄₁ + n₂x̄₂)/(n₁ + n₂)σ² = [n₁(σ₁² + d₁²) + n₂(σ₂² + d₂²)]/(n₁ + n₂)Get the complete formula sheet with derivations — continue in Super Tutor
Frequently Asked Questions
What topics are covered in Statistics for WBJEE?
Statistics is an important chapter in WBJEE Mathematics. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Introduction and Basic Concepts, Range and Coefficient of Range, Mean Deviation, Variance and Standard Deviation - Core Concepts.
How important is Statistics for WBJEE?
Statistics is a frequently tested chapter in WBJEE Mathematics. Questions from this chapter appear regularly in previous year papers. There are 152 practice questions available for this chapter.
How to prepare Statistics for WBJEE?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.
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Practice questions, revision notes, formula sheet and AI doubt-solver for WBJEE Mathematics.