Antonio believes that a coffee will increase the productivity of his office workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given coffee to drink while they work. Group B is not given anything to drink. After an hour, Antonio counts how many stacks of papers each group has made. Group A made 1,765 stacks, while Group B made 2,212 stacks. What is Antonio’s hypothesis?