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.

Control group?

Independent variable?

Dependent variable?

What should Smithers conclusion be?

How could this experiment be improved