Conducting a fair test is one of the most important ingredients of doing good, scientifically valuable experiments. To insure that your experiment is a fair test, you must change only one factor at a time while keeping all other conditions the same. Scientists call the changing factors in an experiment variables.
Eligibility Requirements for VFW Auxiliary Membership: Members must be citizens of the United States or a United States National, and at least 16 years old.
The foreign national is still required to have a passport. To obtain a list of countries eligible and VWP passport requirements for the Visa Waiver Program, please visit https://www.dhs.gov/visa-waiver-program-requirements.