controls and variables?
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. 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.
IDENTIFY THE:
1.control group
2.independent variable
3.dependent var.
4.what should smithers' conclusion be?
5.how could this experiment be improved?
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Okay, you've handed us the entire problem -- where do you need help? Simply handing you all these answers would be cheating -- where are you stuck?
An indep. variable is one that varies on its own without being dependent on anything else. age, Dependent variable is one whose variation is dependent on another variable. demand depends on supply. income depends on years of education (if you assume so) etc.