SAT Prep Can special study courses actually help raise SAT scores? One organization says that the 30 students they tutored achieved an average gain of 60 points when they retook the test. a) Explain why this does not necessarily prove that the special course caused the scores to go up. b) Propose a design for an experiment that could test the effectiveness of the tutorial course. c) Suppose you suspect that the tutorial course might be more helpful for students whose initial scores were particularly low. How would this affect your proposed design?

Study Guide for Exam 2 Stat 200: Spring 2017 Sections 1 3 & 79 Thurs Feb 16 or Fri Feb 17: Computer Testing Center (104 Pollock) Thurs Feb 16 (8:00 AM) – Fri Feb17 (11:00 PM) – sign up for a time slot Be Prompt (and even 15 minutes early), for your scheduled time (If you arrive more than 15 minutes late, you will not be allowed to take the exam). Testing center closes promptly at 11 PM (no extended time allowed). Bring: bring your PSU student ID Permitted: only a pencil/pen – will be given a piece of barcoded scratch paper at the exam – must return prior to leaving the exam (No pencil/pen will be provided) Not permitted: 1) to talk to a classmate, 2) use of a cell phone, camera, calculator a