Question

1. azaria wanted to find out what shampoo made her hair the shiniest. everyday she washed her hair with different shampoos and then rated how shiny her hair was, on a scale from 1 - 10. she used pantene, herbal essences, loreal, and just water. independent variable (iv): i dependent variable (dv): control:

Explanation:

The independent variable is what is changed in an experiment. Here, Azaria changes the type of shampoo used. The dependent variable is what is measured and is affected by the independent variable. So, the shininess of the hair is measured. The control is the group where no treatment (shampoo) is applied, just water.

Answer:

Independent Variable (IV): Type of shampoo (Pantene, Herbal Essences, L'Oreal, water)
Dependent Variable (DV): Shininess of hair (rated on a scale of 1 - 10)
Control: Washing hair with just water