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9 Cards in this Set
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Onesample ztest

(Normal distribution or n ≥ 30) and σ known.
(z is the distance from the mean in standard deviations. It is possible to calculate a minimum proportion of a population that falls within n standard deviations(see Chebyshev's inequality). 

Twosample ztest

Normal distribution and independent observations and (σ₁ AND σ₂ known)


Onesample ttest

(Normal population or n > 30) and σ unknown.
df= n1 

Twosample pooled ttest

(Normal populations or n₁ + n₂ > 40) and independent observations and σ₁ = σ₂ and (σ₁ and σ₂ unknown)
df = n1 + n2 − 2 

Twosample unpooled ttest

(Normal populations or n₁ + n₂ > 40) and independent observations and σ₁ ≠ σ₂ and (σ₁ and σ₂ unknown)


Paired ttest

(Normal population of differences or n > 30) and σ unknown
df= n1 

Oneproportion ztest

np > 10 and n(1 − p) > 10


Twoproportion ztest, equal variances

n₁p₁ > 5 AND n₁(1 − p₁) > 5 and n₂p₂ > 5 and n₂(1 − p₂) > 5 and independent observations


Twoproportion ztest, unequal variances

n₁p₁ > 5 and n₁(1 − p₁) > 5 and n₂p₂ > 5 and n₂(1 − p₂) > 5 and independent observations
