Question

highlight the dependent variable (the thing you observe or measure)
smithers thinks that a special juice will increase the productivity of workers. he creates two groups of 50 workers and assigns each group the same task (in this case, theyre 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.

Explanation:

The dependent variable is what's being measured, which is the number of stacks of papers each group made. So we identify that as the dependent variable.

Answer:

The number of stacks of papers each group made (Group A made 1,587 stacks, Group B made 2,113 stacks)