One Sample Test Statistic Flashcards
1
Q
Known variance
A
z = x̅ - μ / ( σ /√n )
2
Q
Unknown variance
A
large sample, n > 20: Small sample, n < 20
z = x̅ - μ / ( s /√n ) t = x̅ - μ / ( s /√n )
n - 1
3
Q
Proportion
A
z = p̂ - p/ √( p̂q̂/n )
