Surveying people by cell phone is challenging because
A) The owner's location is unknown and may affect sample representativeness
B) Households often have more than one cell phone, so multiple numbers at one address
C) Owners often screen their phone calls and so are less cooperative
D) All of the above are challenges

Question

Quizplus · Accepted Answer

All the options listed are challenges when surveying people by cell phone: unknown location affecting sample representativeness, multiple cell phones per household, and call screening leading to less cooperation.

Surveying People by Cell Phone Is Challenging Because