The technique used by pollsters to place telephone calls randomly to both listed and unlisted numbers is called

Question

Quizplus · Accepted Answer

The technique described in the question is random-digit-dialing. This method involves using a computer-generated list to select phone numbers at random, including both listed and unlisted numbers. This ensures that the sample is representative of the entire population, rather than just those with listed phone numbers.

The Technique Used by Pollsters to Place Telephone Calls Randomly