Final answer:
The independent variable in the experiment is the type of itching powder used, and the dependent variable is the duration of itching reported.
Step-by-step explanation:
In Krusty the Clown's experiment, the independent variable is the type of itching powder used (“Itch-Might” versus “Scratch-A-Lot”), because it is the variable that is being manipulated or changed to test its effects on the outcome. The dependent variable is the duration of itching reported by each group, which is the outcome being measured and expected to change in response to the manipulation of the independent variable.
The independent variable in the experiment is the type of itching powder used, and the dependent variable is the duration of itching reported. The independent variable in this experiment is the type of itching powder given to the two groups: Group A received the Itch-Might powder and Group B received the Scratch-A-Lot powder. The dependent variable is the duration of itching reported by each group. In this case, Group A reported itching for 25 minutes, while Group B reported itching for 35 minutes.