Wednesday, March 26, 2008

• Here is how the class performed on Exam 2:
  
  • Mean = 68% on MC section (compared to 67% on Exam 1), 70% overall
    
  • High = 86% on MC section (compared to 84% on Exam 1), 88% overall
  • Low = 43% (compated to 40% on Exam 1, random guessing = 28%), 52% overall
    
  • Std. Dev. = 11% (compared to 12% on Exam 1), 9% overall
    
• If you filled in your PID on the Scantron form, you should be able to access your MC score via the ONYEN or Student Central websites.
• Answers:  C, C, B, B, B, C, B, A, C, C, C, D, D, B, B, C, A, B, D, D, D, A, A, D, B, A, A, D
  • If you accidently filled in the wrong bubble on your answer sheet, and you wrote sufficient justification for the correct answer on your test papers, then write a note to this effect on the top of your exam so that you can get credit for your explanation.
    
• Since the class average on this exam was lower than what I expected, you will have an opportunity to boost your grade and learn from your mistakes through Test Corrections like on Exam 1.  If you do the following, then 10 points will be added to your exam score:
  
• Provide written justification (preferably on your original test papers - use back sides or other paper as needed) to demonstrate that you understand each question you missed (or questions you happened to get right because you guessed correctly).
• Discuss your explanations with someone who understands at least as much physics as you do.  Have this person sign the following statement at the top of your test paper:  “I am convinced that [your name] fully understands the concepts and problem solutions for this exam.”  Signed ____________   
  

Assignments:

• Answer the recommended conceptual exercises and problems for Chapter 13, and check your understanding by looking at the answers in the back of the textbook.
• Continue working on your Web Project, and send me the URL for your group's website once it is posted.