Question

lisa is working on a science project. her task is to answer the question: \does rogooti (a hair cream sold on tv) affect the speed of hair growth (in length)\. her family is willing to volunteer for the experiment. identify the: 1. independent variable: 2. dependent variable: 3. write a possible hypothesis lisa could write for this experiment. if then because 4. write a procedure (list of steps) lisa could follow to complete this experiment. you should have at least 3 steps.

Explanation:

Step1: Identify independent variable

The factor that is changed or manipulated is the use of Rogooti hair - cream. So, the independent variable is the application of Rogooti hair - cream.

Step2: Identify dependent variable

The factor that is measured and is affected by the independent variable is the speed of hair growth (in length). So, the dependent variable is the speed of hair growth.

Step3: Formulate hypothesis

A hypothesis is an if - then - because statement. A possible hypothesis: If a person uses Rogooti hair - cream, then their hair will grow faster because the ingredients in Rogooti are designed to stimulate hair growth.

Step4: Write procedure

1. Measure the initial hair length of each family member who is volunteering for the experiment and record the data.
2. Divide the family members into two groups: a treatment group that will use Rogooti hair - cream as directed and a control group that will not use Rogooti (but may use a placebo hair - cream or no hair - cream at all).
3. Instruct the treatment group to apply Rogooti hair - cream regularly (e.g., once a day) and the control group to follow their normal hair - care routine.
4. After a set period of time (e.g., 4 weeks), measure the hair length of each family member again and record the data.
5. Calculate the difference in hair length for each person (final length - initial length) and compare the average hair - growth rate between the treatment group and the control group.

Answer:

1. Independent Variable: Application of Rogooti hair - cream
2. Dependent Variable: Speed of hair growth
3. If a person uses Rogooti hair - cream, then their hair will grow faster because the ingredients in Rogooti are designed to stimulate hair growth.
4. 1. Measure the initial hair length of each family member who is volunteering for the experiment and record the data.
5. Divide the family members into two groups: a treatment group that will use Rogooti hair - cream as directed and a control group that will not use Rogooti (but may use a placebo hair - cream or no hair - cream at all).
6. Instruct the treatment group to apply Rogooti hair - cream regularly (e.g., once a day) and the control group to follow their normal hair - care routine.
7. After a set period of time (e.g., 4 weeks), measure the hair length of each family member again and record the data.
8. Calculate the difference in hair length for each person (final length - initial length) and compare the average hair - growth rate between the treatment group and the control group.