Black_Formula-draft3

# Black_Formula-draft3 - distribution Standard deviation of a...

This preview shows pages 1–2. Sign up to view the full content.

FORMULA SHEET Population mean (ungrouped) Sample mean (ungrouped) Population mean (grouped data) μ = ∑xf N Sample mean (grouped data) ‾x = ∑xf N Median of Grouped Data Median = L + (n/2 – CF)i F Population variance (ungrouped) σ² = N∑x² - ∑(x)² Population variance (grouped ) Sample variance 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) Law of conditional probability P(A/B) = P(AandB) P( B) Mean (expected) value of a discrete

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: distribution Standard deviation of a discrete distribution = x 2 P(x) - Binomial formula Mean of a binomial distribution 1 FORMULA SHEET Standard deviation of a binomial distribution z formula for sample means z formula for sample means when there is a finite population z formula for sample proportions z formula for sample proportions when there is a finite population Sample size when estimating Confidence interval to estimate : population standard deviation known n z x 2 / Confidence interval to estimate : population standard deviation unknown n s t x n 1 /,- Confidence interval to estimate p n q p z p 2 / Sample size when estimating p n = zp(1-p) E z test for a single mean 2...
View Full Document

## Black_Formula-draft3 - distribution Standard deviation of a...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online