STATISTICAL INFERENCE TABLE:

 

Case

parameter

estimator

standard deviation

standard error

Sampling Distribution

one mean or

matched pairs diff

 

 

 

 

 

t (n-1)

 

difference

of two independent means

 

 

 

 

 

 

t with conservative

df  = smallest of

(n1-1) and (n2-1)

 

one proportion

 

 

    

*

or

 

 

 

CI:

 

ST:

 

 

 

z

 

difference

 of two independent proportions

 

 

 

* or

 

*

 

 

 

CI:

 

ST:

 

 

 

z