Warm Up: 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.

1. Control Group

Group B

2. Independent Variable

volume of special juice

3. Dependent Variable

number of stapled packs of paper

4. What should Smithers’ conclusion be?

The special juice interferes with the workers’ productivity since Group A stapled fewer packets than group B.

5. How could this experiment be improved?

Vary the volume of juice given, increase the sample size, take more time points, and conduct the experiment for a longer period of time.

–Continue Vocabulary Presentation (Experimental Design)

–Qualitative vs. Quantitative Observations

–Experimental Design Explore

–Experimental Design Vocabulary Explain