Answer:
unrepresentative sample
Step-by-step explanation:
The results of the survey were not valid, and this was due to an unrepresentative sample. This is a type of sample who's target group has not been given distributed characteristics, meaning that anyone could have taken the survey and therefore is subjected to biased results. In this specific scenario, since all American's were surveyed many individuals may have provided false answers in hopes of screwing the opposition's numbers.