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Do Now

Do Now. Answer the questions on the worksheet that you picked up at the front. USE YOUR NOTES and/or the book to help you answer any questions that you are unsure of. Every question corresponds with a specific idea that we have learned in class – figure it out !

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Do Now

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  1. Do Now Answer the questions on the worksheet that you picked up at the front. USE YOUR NOTES and/or the book to help you answer any questions that you are unsure of. Every question corresponds with a specific idea that we have learned in class – figure it out! Have your HW Set from Week 10 on your desk.

  2. HW Check / Quiz Review • 12 • 18 • 24

  3. Chapter 7 Quiz STUDY!!!! • Describing Associations (4) • Identifying Variables • Estimating r • Correlation Conditions • Correlation Properties • Causation & Lurking Variables Materials: • ALL class worksheets • Notes • Do Nows • HW Questions

  4. Correlation vs. Causation • Read the article provided. • Highlight any key ideas. • Summarize the reading in three sentences at the bottom of the article.

  5. Do Storks Actually Bring Babies?

  6. What else is going on?

  7. Lurking Variable • A variable that has an important effect and yet is not included amongst the predictor variables under consideration. • A lurking variable can falsely suggest a strong relationship between 2 variables or may hide a relationship that is really there.

  8. Can you identify the Lurking Variable? • Studies have found that ice cream consumed and number of drownings are highly correlated. Hot Weather

  9. Can you identify the Lurking Variable? • A study that appeared in the American Journal of Cardiology (March 15, 2003) found that heart attack survivors who owned a dog generally had better heart function post-heart attack than those who did not own a dog. Does a dog help a heart heal faster? Exercise / Physical Activity

  10. Here’s a Visual Guide:

  11. Find the Lurking Variable Studies have found that there is a strong correlation between sunscreen use and skin cancer. The findings are actually very interesting. They show that as the amount of sunscreen by a person increases, so does their likelihood to get skin cancer in his life. How can this be?

  12. Identify the Lurking Variable • In the National Basketball Association, there is a strong positive association between the number of turnovers a player has and the number of points that he scores. A turnover is when a player loses the ball to the other team. Could a player increase his point totals by turning the ball over more frequently?

  13. Identify the Lurking Variable

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