The Control Group The Independent Variable The Dependent Variable What should the conclusion be? ...
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Transcript of The Control Group The Independent Variable The Dependent Variable What should the conclusion be? ...
EXPERIMENTAL DESIGN WITH THE SIMPSONS
FOR EACH EXERCISE, PLEASE DETERMINE The Control Group The Independent Variable The Dependent Variable What should the conclusion be? How Could the Experiment Be
Improved?
HOMER SIMPSON
Homer notices that his shower is covered in a strange green slime.
His friend Barney tells him that coconut juice will get rid of the green slime.
Homer decides to check this out by spraying half the shower with coconut juice and the other half with water.
After three days of “treatment” there is no change in the appearance of the green slime on either side of the shower.
BART SIMPSON
Bart believes that mice exposed to microwaves will become extra strong
He placed 10 mice in a microwave for 10 seconds.
He compared these to another 10 mice that had not been exposed by placing a block of heavy wood in front of their food.Mice Group Could
move block
Could not move block
Exposed to Microwaves
8 2
Not Exposed 7 3
KRUSTY THE CLOWN
Subject A
Old Powder
30 minutes of itching
Subject B New Powder
45 minutes of itching
Krusty was told that a certain itching powder was the newest best thing on the market, causing 50% longer lasting itches. He buys the new powder and compares it to his old powder by testing the two products on two different subjects
WAYLON SMITHERS
Smithers thinks that a special juice will increase the productivity of his workers.
He creates two groups of 50 workers each and assigns them the same task, stapling sets 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, he counts how many stacks of papers each group has made.
Group Number of Stapled Papers
A 1,587
B 2,113
DESIGN AN EXPERIMENT FOR LISA SIMPSON
Describe how Lisa would perform this experiment
Identify the control group and the independent and dependent variables
Lisa Simpson is working on her science project: “Does Rogooti (a commercial hair product) affect the speed of hair growth?” Her family is willing to volunteer for the experiment.