Smithers thinks that a special juice will increase the productivity of 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 the special juice to drink
while they work, Group B is not given the special juice. After an hour, Smithers counts
how many stacks of papers each group has made. Group A made 1,587 stacks, Group
B made 2,113 stacks

What should Smithers conclusion be?
How could this experiment be improved?