Answer:
Step-by-step explanation:
Given that a college student concluded "38% of adults in the United States regularly visit a doctor"
For this, student questioned 520 randomly selected members of her college
The problem here is
when she is concluding about the adults as a whole in the world, taking into account the total population of adults, 520 is not a proportional size representing the entire population
Also she selected only members of her college. This may give a biased opinion.
To get correct idea, she must survey a large sample size from all over the countries and come to conclusion
