100
Jake wants to see if healthy eating and goodnight sleep will help him do better on his test then staying up late and eating junk food. For one week, he ate junk food and slept until 10:00 am. Then he, he took the test. Then, he ate healthy food and slept for 10 hour each day for a week and he took the test.
What is the IV?
His diet and the amount of sleep.