Relevant Statistic 
Given Conditions 
Relevant

Equation 
Population Mean 
is known; pop.is normally distributed 
StandardNormal 

Population Mean 
n > 30; or sis known 
StandardNormal 

Population Mean 
n 30; pop. isnormally distributed 
Studentt 

Pop. Variance andStandard Distribution 
Population isnormally distributed 
ChiSquare 

Population Proportion 
np 5; nq5 
StandardNormal 