Extra Credit

• Submit a report on a newspaper story about an experiment. Make sure that you read about the difference between experiments and observational studies in the text. Follow the same format as you follow for assigned newspaper items.
  Due by Tuesday, May 20.
• Extra credit homework from our text. Do these problems entirely on your own!
  18.11, 18.12, 19.8, 19.10, 21.24, 21.28
  Due by Tuesday, May 20.