A researcher wants to explore the relationship between the following two variables, Weight 1 and Weight 2.

Weight 1	Weight 2
130	138
160	156
220	224
125	119
205	213

 

If Weight 1 is the weight (in pounds) of a random sample of five men who were accepted as models, and Weight 2 is the weight (in pounds) of a random sample of five men who were rejected as models, which of the following is the appropriate inference method?