1. Lesson 12-1 Pages 606-611 Stem-and-Leaf Plots

2. What you will learn! 1. How to display data in stem-and-leaf plots. 2. How to interpret data in stem-and-leaf plots.

3. Stem-and-leaf plot Stems Leaves Back-to-back stem-and-leaf plot

4. What you really need to know! One way to organize and display data is to use a stem- and-leaf plot. In a stem- and-leaf plot, numerical data are listed in ascending or descending order.

5. What you really need to know!Stem Leaf Leaf 0 5 5 5 6 5 5 5 6 1 0 0 0 0 1 2 2 5 8 8 9 0 0 0 0 1 2 2 5 8 8 9 2 1 2 5 8 1 2 5 8 3 0 2 │5 = 25

7. Example 1: Display the data on the following slide in a stem- and-leaf plot.

8. Peanuts Harvested, 2001 State State Amount (lb) Alabama2400 Florida2800 Georgia2800 New Mexico 2400 North Carolina 2900 Oklahoma2200 South Carolina 2900 Texas2600 Virginia3000

9. Stem Leaf Leaf2 2 4 4 6 8 8 9 9 2 4 4 6 8 8 9 9 3 0 2 │4 = 2400 lb

10. The stem-and-leaf plot lists the percent of voters in each state that voted for U.S. representatives in 1998. 0 1

11. Which interval contains the most percentages? 30 -39 0 1

12. What is the greatest percent of voters that voted for U.S. representatives? 59% 0 1

13. What is the median percent of voters that voted for U.S. representatives? 37.5% 0 1

14. Which state produces more honey? California at 45 million pounds.

15. Which state has the most varied production? California. The data are more spread out.

16. Page 608 Guided Practice #’s 3-9

18. Pages 606-608 with someone at home and study examples! Read:

19. Homework: Pages 609-611 #’s 10, 12, 14, 16-24 #’s 30-47 Lesson Check 12-1

26. Page 752 Lesson 12-1