Story 1 - Krusty Krabs Breath Mints

• Mr. Krabs created a secret ingredient for a breath mint that he thinks will “cure” the bad breath people get from eating crabby patties at the Krusty Krab.

• He asked 100 customers with a history of bad breath to try this new breath mint.

• He had fifty customers (Group A) eat a breath mint after they finished eating a crabby patty.

• The other fifty (Group B) also received a breath mint after they finished the sandwich, however, it was just a regular breath mint and did not have the secret ingredient.

• Both groups were told that they were getting the breath mint that would cure their bad breath.

• Two hours after eating the crabby patties, thirty customers in Group A and ten customers in Group B reported having better breath than they normally had after eating crabby patties.

Story 2 - Sponge Bob Clean Pants:

Read the following

SpongeBob noticed that his favorite pants were not as clean as they used to be. His friend Sandy told him that he should try using Clean-O detergent, a new laundry soap she found at Sail-Mart. SpongeBob made sure to wash one pair of pants in plain water and another pair in water with the Clean-O detergent. After washing both pair of pants a total of three times, the pants washed in the Clean-O detergent did not appear to be any cleaner than the pants washed in plain water."My PaNtsaRE DIRty!"

Part II. For each experimental question, identify the independent variable (IV), dependent variable (DV), constants and the control.

For Each, Ask Yourself:

• What am I changing on purpose so that I can answer my question? -- this is your Independent Variable.

• What is being measured? What data (numbers) are being collected? --this is your Dependent Variable.

• What is staying the same in all of the exeriments? -- these are your Constants.

• What is your zero IV level? What is your normal group that does not recieve any testing.---This is your Control