Question

lisa simpson 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. you are to describe how lisa would set - up and perform this experiment. you are to make sure you identify the following: what a possible hypothesis could be create a procedure with potential materials on how she could set this experiment up identify the control group, the independent variable and dependent variable.

Explanation:

Hypothesis: Rogooti increases hair growth speed vs. no product.
Materials: Rogooti, placebo (water), rulers, notebook, family volunteers.
Procedure: 1. Select 4 family members; split into 2 groups (2 each). 2. Measure initial hair length (scalp, same area). 3. Experimental group: apply Rogooti daily; control group: apply placebo. 4. Measure hair length weekly for 4 weeks. 5. Record data.
Variables: Control group (placebo users), Independent (Rogooti use), Dependent (hair growth speed).

Answer:

Hypothesis: Rogooti increases the speed of hair growth compared to not using any hair product.
Materials: Rogooti hair product, placebo (e.g., plain water or unscented lotion), measuring rulers (cm), notebook for data recording, 4 family volunteers (similar age/gender if possible).
Procedure: 1. Recruit 4 family volunteers; divide into 2 groups (2 in experimental, 2 in control). 2. Measure initial hair length of all volunteers from the same scalp area (e.g., crown) using a ruler; record in notebook. 3. Experimental group: Apply Rogooti to their hair daily as per product instructions. Control group: Apply placebo to their hair daily in the same manner. 4. Ensure all volunteers maintain consistent hair care (e.g., same shampoo, no other products) during the experiment. 5. Measure and record hair length from the same scalp area weekly for 4 weeks. 6. Calculate average weekly hair growth speed for each group (final length - initial length / 4 weeks).
Control group: Family members applying the placebo (no Rogooti).
Independent variable: Use of Rogooti (experimental group) vs. placebo (control group).
Dependent variable: Speed of hair growth (measured in cm/week).