Flashcards
Statistics Formulas and Identities
Cards in this deck (15)
- 1P(A and B)P(A) * P(B|A)
or
P(B) * P(A|B) - 2P(A or B)P(A) + P(B) - P(A and B)
- 3Variance1/n∑x² - x̄²
∑(x²p) - x̄²
1/n∑(x²f) - x̄² - 4Standard Deviation√(Variance)
- 5Binomial DistributionB(number of objects, probability of success)
- 6Normal DistributionN(Mean, Standard Deviation)
- 7Poisson DistributionPo(Mean/Variance)
- 8Geometric DistributionGeo(Probability)
- 9Approximating Binomial with Normalnp>5
nq>5
Must add continuity correction
N(np, npq) - 10Poisson: P(X=x)e^-λ * (λ^x)/x!
- 11Conditions for PoissonOccur Randomly
Cannot occur Simultaneously
Occur Independently
Occur at a Constant Rate - 12Approximating Binomial using Poissonn>50
np<5
Po(np) - 13Approximating Poisson using Normalλ > 15
Continuity Correction must be applied
N(λ, λ) - 14Type I ErrorMade when a true null hypothesis is rejected
For a continuous test statistic,
P(Type I Error) = Significance level - 15Type II ErrorMade when a false null hypothesis is accepted
Change the value of μ in the distribution to that stated in the question
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- Maths (Statistics) Flashcards on Statistics Formulas and Identities, created by Dominic Trott on 11/03/2015.
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- Dominic Trott
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