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9-2

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

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9-2

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

  2. 9-2 Organizing Data Course 3 Warm Up Compare. Write < or >. 1.3(6) 15 2. 53 – 37 19 3. 27 2(14) 4. 49 – (–4) 51 > < < >

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

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

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

  6. 9-2 Organizing Data Course 3 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. 9-2 Organizing Data Course 3 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.

  8. 9-2 Organizing Data Course 3 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. xxx xxx xx xx xx x x x x 50 55 60 65 70 75 80 85 90 95 100

  9. 9-2 Organizing Data Course 3 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.

  10. 9-2 Organizing Data Course 3 Check It Out: Example 1 Continued Use a line plot to organize the feet of snow each season. There are 20 numbers in the data set and 20 x’s above the number line. xxxx xxx xxx xxx xx xx x x x 1 2 3 4 5 6 7 8 9 10 11

  11. 9-2 Organizing Data 25 = 25 Course 3 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

  12. 9-2 Organizing Data Course 3 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. 9-2 Organizing Data Course 3 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. 9-2 Organizing Data Course 3 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. 9-2 Organizing Data Course 3 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. 1950 2000 1 2 3 4 4 8 0 5 9 9 Key: | 2 | 9 means 29 8 | 1 | means 18 5 1 3 9

  16. 9-2 Organizing Data Course 3 Check It Out: Example 3 Use the given data to make a back-to-back stem-and-leaf plot. Did not Vote Voted 8 5 5 8 4 1 0 0 8 1 0 2 6 6 2 3 4 Key: | 0 | 8 means 8 4 | 1 | means 14

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

  18. 9-2 Organizing Data Course 3 Additional Example 4: Organizing data in Venn Diagrams Make a Venn diagram to show how many 8th grade students play soccer.

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

  20. 9-2 Organizing Data Course 3 Check It Out: Example 4 Make a Venn diagram to show how many 6th grade students participate in Band.

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

  22. 9-2 Organizing Data xxxxxxxxxxxx xxxxxxxx xxx xxx xx xx 0 1 2 3 4 5 Course 3 Insert Lesson Title Here Lesson Quiz: Part I 1. Use a line plot to organize the data of daily rainfall during the month of June.

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

  24. 9-2 Organizing Data Course 3 Insert Lesson Title Here Lesson Quiz: Part III 3. Make a Venn diagram to show how many voters under age 30 responded to the survey.

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