A surveyor wants to know how many shoppers at a mall like to read books. He surveys 100 people coming out of a bookstore at the mall. Why is the sample biased?

A.
There are not enough people in the sample.

B.
The surveyor did not sample the entire population at the mall.

C.
It is unlikely that people who shop in bookstores are interested in surveys.

D.
People who shop in bookstores are likely to read more books than those who do not.

Question

A surveyor wants to know how many shoppers at a mall like to read books. He surveys 100 people coming out of a bookstore at the mall. Why is the sample biased?
 
 A.
There are not enough people in the sample.
 
 B.
The surveyor did not sample the entire population at the mall.
 
 C.
It is unlikely that people who shop in bookstores are interested in surveys.
 
 D.
People who shop in bookstores are likely to read more books than those who do not.

anonymous · Answer

I think that the answer is D.