4. Jimmy likes to work with his friend Joe in 7th grade science class labs. However, he notices that he tends to get lower grade
s when he does work with Joe, because he and Joe like to talk about basketball and not science. He's decided to investigate if his science lab grades are higher when he works with Joe or if they're higher when he works with someone else. He has set goals to become a better student, so help him write a hypothesis for his study. a. Manipulated variable b. Responding variable