Question

"38% of adults in the United States regularly visit a doctor". This conclusion was reached by a college student after she had questioned 520 randomly selected members of her college. What is the problem with her survey?

Answer 1

Bad sample is the answer

Answer 2

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