Question: In 1936 the United States was still suffering from the Great Depression. During the presidential election campaign, an extensive survey of voter attitudes was undertaken [0 find out whether the public preferred the incumbent, Franklin Delano Roosevelt, or the challenger, Alf Landon. The sample gathered randomly from telephone book listings throughout the country. A preference was found for Alf Landon; however, Roosevelt won re-election by a huge landslide. What type or research was being conducted? do you think it failed to make all accurate prediction.