The Two Sample Dependent T Test Should Be Used When

Multiple Choice

The two sample dependent t test should be used when two samples consist of the same people or objects measured "before" and "after" some event occurs, or when two samples consist of

A) randomly selected experimental and control groups.
B) two naturally different groups such as males and females.
C) individuals or objects that have been matched to make them comparable in relation to certain variables.
D) all of the above