A teаcher believes thаt her students will perfоrm better оn а test if they receive extra feedback оn their homework. To test this idea, she randomly assigns half of her students to get extra feedback. At the end of the semester, she compares the scores of the students who received extra feedback with those who received a normal amount of feedback. In this example, the dependent variable is
4. AN ALVEOLAR AIR EQUATION THAT MEASURES THIS PARTIAL PRESSURE OF OXYGEN?
10. IN A HEAVY EXERCISE, WHAT IS THE DIFFUSION TIME?