Answer: George Horace Gallup
Explanation: George Gallup was an American pioneer of survey sampling techniques and inventor of the Gallup poll, a successful statistical method of survey sampling that was used to measure public opinion. He is often referred to as the developer of public polling.
In 1936, his organization, the American Institute of Public Opinion(Gallup Poll) achieved national recognition by correctly predicting, using the replies of just 50,000 respondents, that Franklin Roosevelt would defeat Alf Landon in the United States Presidential election. This contradicted the widely-respected Literary Digest magazine whose poll which was based on over two million returned questionnaires predicted that Landon would be the winner.