Exit polls are surveys of a random sample of voters taken after they leave their voting location, supplemented by telephone interviews to account for absentee or early voters in many states.

Exit polls are surveys of a random sample of voters taken as they leave their polling place on Election Day. Absentee and early voters are represented by either telephone polls or in-person exit ...

He claimed that the Delhi elections exit poll was based on a sample size of 24,000, collected mostly through on-ground surveys by around 250 to 300 people. The organisation has 24 in-house analysts.