One of the issues in the U.S. presidential election in 2012 was the Keystone XL pipeline, which would send Canadian oil to the refineries in Texas. Pew Research Center conducted a survey of American adults and asked each whether he or she was in favor (1) or opposed (2) to the pipeline. The survey identified each respondent as either male or female. Is there sufficient evidence to infer that men and women differ in their support of the pipeline?