How do you determine the affects of watching many hours of TV?

1. How do you determine the affects of watching many hours of TV?

2. In this lesson you will learn how to interpret scatter plots by identifying positive, negative, or no association.

3. 100 90 80 70 60 50 40 30 20 10 Test score 1 2 3 4 5 6 7 8 9 10 Homework completed

4. Negative Positive

5. 100 90 80 70 60 50 40 30 20 10 X Y Test score Positive association 1 2 3 4 5 6 7 8 9 10 Homework completed

6. 100 90 80 70 60 50 40 30 20 10 X Y Negative association Test score 1 2 3 4 5 Hours watching TV

7. 10 9 8 7 6 5 4 3 2 1 No association # of letters in last name 1 2 3 4 5 6 7 8 9 10 # of letters in first name

8. Okay, maybe a little less TV.

9. In this lesson you have learned how to interpret a scatter plot by identifying positive, negative, and no association.

10. Determine the association in each graph. Test scores Money earned $$ on music card # mp3 downloads # letters in name Hours worked

11. Would you expect a positive, a negative, or no association between the two variables? Explain why. • A person’s height and the number of letters in that person’s name. • The time spent exercising and the amount of calories burned. • The number of pages printed and the amount of ink left in the printer.

12. Collect two sets of data that, when collected, would likely have a: • Positive association • Negative association • No association

13. Which graph shows a positive association? Height Calories Burned $$ in bank # of withdrawals # letters in name Time exercising

14. What would be the association between shoe size and number of miles traveled to school each day?