Question

krusty was told that a certain itching powder was the newest best thing on the market; it even claims to cause 50 % longer lasting itches. interested in this product, he buys the itching powder and compares it to his usual produce. one test subject (a) is sprinkled with the original itching powder, and another test subject (b) is sprinkled with the experimental itching power. subject a reported having itches for 30 minutes, subject b reported to have itches for 10 hours.

lisa is working on a science project. her task is to answer the question: \does rogooti (which is a commercial hair product) affect the speed of hair growth?\ her family is willing to volunteer for the experiment.

1. control group
2. manipulated (independent) variable
3. responding (dependent) variable
4. what should krustys conclusion be?
5. describe how lisa would perform this experiment. identify the control group, and the manipulated and responding variables in your description.

Explanation:

Step1: Identify control group for Krusty's experiment

The subject with original itching powder (Subject A) is the control group as it is the standard for comparison.

Step2: Identify independent variable for Krusty's experiment

The type of itching powder (original or experimental) is the manipulated (independent) variable as it is being changed.

Step3: Identify dependent variable for Krusty's experiment

The duration of itching is the responding (dependent) variable as it depends on the type of powder.

Step4: Draw conclusion for Krusty's experiment

The experimental itching powder caused much - longer lasting itches than the original one.

Step5: Describe Lisa's experiment setup

For Lisa's experiment, divide family members into two groups. One group (control group) doesn't use Rogooti, the other (experimental group) uses it. Measure hair growth length over a set period. The control group is the group not using Rogooti, the manipulated variable is the use of Rogooti (used or not used), and the responding variable is the speed of hair growth (measured by length of hair growth over time).

Answer:

1. Subject A (sprinkled with original itching powder)
2. Type of itching powder (original or experimental)
3. Duration of itching
4. The experimental itching powder caused much longer - lasting itches than the original one.
5. Divide family members into two groups. The control group does not use Rogooti, and the experimental group uses Rogooti. Measure the length of hair growth over a set period. Control group: Family members not using Rogooti. Manipulated variable: Use of Rogooti (used or not used). Responding variable: Speed of hair growth (measured by length of hair growth over time).