Smithers thinks that a special juice will increase the productivity of

workers. He creates three groups of 50

workers each and assigns each group

the same task, to staple sets of papers.

Group 1 drinks 100mL of the special juice while they work.

Group 2 drinks 50mL of the special juice while they work.

Group 3 is not given the special juice while they work.

After an hour, Smithers counts how many sets of papers

each group stapled. He made the data table below.
Group 1
1,030
Group 2
1,700
Group 3
2,113

Dependent Variable:

Independent Variable:

A Control Variable:

Experimental Group:

Control Group: