An elementary school teacher is interested in the relation between sugar consumption and activity level in preschool children.The teacher gives 30 preschool children from Preppy Preschool Playland 0 milligrams, 20 milligrams, or 50 milligrams of sucrose (sugar) in a breakfast drink.She then observes their behavior for 30 minutes during their morning outdoor play period and codes their activity level.In this example, the independent variable is:
A) 30 preschool children.
B) the amount of sucrose.
C) all preschool children.
D) activity level.

Question

Quizplus · Accepted Answer

The independent variable in this experiment is the amount of sucrose given in the breakfast drink, as this is being manipulated by the teacher to see the effect on activity level. The preschool children and activity level are dependent variables, as they are being observed and measured respectively in response to changes in the independent variable.

An Elementary School Teacher Is Interested in the Relation Between