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Keller Formula Sheet-#1

# Keller Formula Sheet-#1 - FORMULA SHEET QNM 222 Coefficient...

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FORMULA SHEET QNM 222 Population mean (ungrouped) Sample mean (ungrouped) Population mean (grouped data) μ = ∑xf N Sample mean (grouped data) ‾x = ∑xf n n=∑f Median of Grouped Data Median = L + (n/2 – CF)i F Population variance (ungrouped) σ² = N∑x² - ∑(x)² Population variance (grouped ) σ 2 =N∑x 2 f - ∑(xf) 2 N 2 Sample variance (ungrouped) s² = n∑x²−(∑x)² n(n-1) Chebyshev's theorem Coefficient of variation z score Coefficient of Skewness S k = 3(Mean – Median) Standard Deviation Combination formula nCr = n! r!(n-r)! Permutation Formula n Pr = n! (n-r)! General Law of addition P(A or B) = P(A) + P(B) – P(AandB) Special Law of addition P(A or B) = P(A) + P(B) General Law of multiplication P(AandB) = P(A) * P(B/A) Special law of multiplication P (AandB) = P (A) * P(B)

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Keller Formula Sheet-#1 - FORMULA SHEET QNM 222 Coefficient...

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