1. 9-2 Organizing Data Course 3 Warm Up Warm Up Problem of the Day Problem of the Day Lesson Presentation Lesson Presentation

2. Warm Up Compare. Write. 1. 3(6) 15 2. 53 – 37 19 3. 27 2(14) 4. 49 – (–4) 51 < Course 3 9-2 Organizing Data > < >

3. Problem of the Day If today is Wednesday, what day of the week will it be in 100 days? Friday Course 3 9-2 Organizing Data

4. Learn to organize data in tables and stem-and-leaf plots. Course 3 9-2 Organizing Data

5. Vocabulary line plot stem-and-leaf plot back-to-back stem-and-leaf plot Venn diagram Insert Lesson Title Here Course 3 9-2 Organizing Data

6. Course 3 9-2 Organizing Data Organizing raw data can help you see patterns and trends. One way to organize data is to use a line plot. A line plot uses a number line to show how often a value occurs in a data set.

7. Course 3 9-2 Organizing Data Additional Example 1: Organizing Data in Line Plots Use a line plot to organize the math exam scores. Find the least value, 50, and the greatest value, 100, in the data set. Then draw a number line from 50 to 100. Place an “x” above each number on the number line for each time it appears in the data set. Student Test Scores 100957580 601006075 908580100 50906580

8. Course 3 9-2 Organizing Data Additional Example 1 Continued Use a line plot to organize the math exam scores. There are 16 numbers in the data set and 16 x’s above the number line. Student Test Scores 100957580 601006075 908580100 50906580 50 55 60 65 70 75 80 85 90 95 100 x x x x x xxxxxx x x xxxxxx

9. Course 3 9-2 Organizing Data Check It Out: Example 1 Use a line plot to organize the feet of snow each season. Find the least value, 1, and the greatest value, 11, in the data set. Then draw a number line from 1 to 11. Place an “x” above each number on the number line for each time it appears in the data set. Feet of Snow 41175 19510 7439 111076 59 11

10. Course 3 9-2 Organizing Data Check It Out: Example 1 Continued There are 20 numbers in the data set and 20 x’s above the number line. 1 2 3 4 5 6 7 8 9 10 11 x x x xxxxxx xxxxxx x xxxxxxxx x xxxxxx Feet of Snow 41175 1959 7439 1076 59 11 Use a line plot to organize the feet of snow each season.

11. Course 3 9-2 Organizing Data A stem-and-leaf plot is another way to display data. The values are grouped so that all but the last digit is the same in each category. Stem = first digits(s) Leaf = last digit 2 5 = 25

12. Course 3 9-2 Organizing Data Additional Example 2: Reading Stem-and-Leaf Plots List the data values of the stem-and-leaf plot. 1 2 5 4 0 1 1 5 2 7 9 Key: 1 2 means 12 The data values are: 12, 15, 40, 41, 41, 52, 57, and 59.

13. Course 3 9-2 Organizing Data Check It Out: Example 2 List the data values of the stem-and-leaf plot. 2 3 6 3 7 8 9 4 2 5 6 Key: 2 3 means 23 The data values are: 23, 26, 37, 38, 39, 42, 45, and 46.

14. Course 3 9-2 Organizing Data A back-to-back stem-and-leaf plot is used to compare two sets of data. The stems are in the center, and the left leaves are read in reverse.

15. Course 3 9-2 Organizing Data Additional Example 3: Organizing data in Back-to- Back Stem-and-Leaf Plots Use the given data to make a back-to-back stem-and-leaf plot. 12341234 2000 1950 0 5 9 9 4 8 5 1 3 Key: | 2 | 9 means 29 8 | 1 | means 18 9

16. Course 3 9-2 Organizing Data Check It Out: Example 3 Use the given data to make a back-to-back stem-and-leaf plot. 0 8 1 0 2 6 6 2 3 4 Voting Statistics AgeVoted Did not Vote Millions 18 to 24 years818 25 to 34 years1621 35 to 44 years2420 45 to 54 years2314 55 to 64 years168 65 to 74 years125 75 years up105 Did not VoteVoted 8 5 5 8 4 1 0 Key: | 0 | 8 means 8 4 | 1 | means 14

17. Course 3 9-2 Organizing Data Venn Diagrams are used to show relationships between sets.

18. Course 3 9-2 Organizing Data Additional Example 4: Organizing data in Venn Diagrams Make a Venn diagram to show how many 8 th grade students play soccer. Survey Results GradeSportGradeSport 6Baseball8Tennis 6 7Soccer 8 7Baseball 8 6Soccer 7soccer8

19. Course 3 9-2 Organizing Data Additional Example 4 Continued Make a Venn diagram to show how many 8 th grade students play soccer. Draw two circles. Label one circle “8 th Graders” and the other circle “Soccer Players”. The region that overlaps represents both 8 th Graders and Soccer Players. 4 5 2

20. Course 3 9-2 Organizing Data Check It Out: Example 4 Make a Venn diagram to show how many 6 th grade students participate in Band. Survey Results GradeActivityGradeActivity 6Band8Art 6 6Band 8 7 6Math Club6Band 7Art8Math Club

21. Course 3 9-2 Organizing Data Check It Out: Example 4 Continued Draw two circles. Label one circle “6 th Graders” and the other circle “Band”. The region that overlaps represents both 6 th Graders and Band Members. 5 5 Make a Venn diagram to show how many 6 th grade students participate in Band. 3

22. Lesson Quiz: Part I Insert Lesson Title Here Course 3 9-2 Organizing Data 1. Use a line plot to organize the data of daily rainfall during the month of June. Inches of Rainfall During June 0341000105 2100003301 1100445211 0 1 2 3 4 5 xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx x xxxxxx xxxxxx x

23. Lesson Quiz: Part II Insert Lesson Title Here Course 3 9-2 Organizing Data 2. List the data values in the stem-and-leaf plot. 0 6 9 1 4 7 2 2 5 Key: 1 5 means 15 6, 9, 14, 17, 22, 25

24. Lesson Quiz: Part III Insert Lesson Title Here Course 3 9-2 Organizing Data 3. Make a Venn diagram to show how many voters under age 30 responded to the survey. Survey Results AgeRegistered to Vote AgeRegistered to Vote 18yes55yes 20no31no 47no43no 62yes25yes 29yes19no 5 5 3