1. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Warm Up Warm Up California Standards California Standards Lesson Presentation Lesson PresentationPreview

2. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Warm Up Jason deposits $200 in an account that earns 3.6% simple interest. How long until the total Amount is $300? Almost 14 years

3. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots SDAP1.1 Know various forms of display for data sets, including a stem-and-leaf plot or box-and-whisker plot; use the forms to display a single set of data or to compare two sets of data. California Standards

4. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Vocabulary line plot stem-and-leaf plot back-to-back stem-and-leaf plot

5. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Example 1: Organizing Data in Line Plots Use a line plot to organize the math exam scores. Step 1: Find the least and greatest values in the data set. Then draw a number line that includes these values. least value: 50 greatest value: 100 Student Test Scores 100957580 601006075 908580100 50906580

6. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Example 1 Continued 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 Step 2: Place an x above the number on the number line that corresponds to each student’s test score.

7. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Check It Out! Example 2 Use a line plot to organize the feet of snow each season. Step 1: Find the least and greatest values in the data set. Then draw a number line from 1 to 11. least value: 1 greatest value: 11 Feet of Snow 41175 19510 7439 111076 59 11

8. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Check It Out! Example 2 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. Step 2: Place an x above the number on the number line that corresponds to the number of feet of snow that fell.

9. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots A stem-and-leaf plot uses the digits of each number in a data set to group the individual numbers. Each leaf on the plot represents the right-hand digit in a data value, and each stem represents left-hand digits. The key shows the values of the data on the plot. 2 4 7 9 3 0 6 Stems Leaves Key: 2|7 means 27

10. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots The data shows the number of years coached by the top 15 coaches in the all-time NFL coaching victories. Make a stem-and-leaf plot of the data. Then find the number of coaches who coached fewer than 25 years. 33, 40, 29, 33, 23, 22, 20, 21, 18, 23, 17, 15, 15, 12, 17 Example 3: Organizing and Interpreting Data in a Stem-and-Leaf Plot Step 1: Order the data from least to greatest. Since the data values range from 12 to 40, use tens digits for the stems and ones digits for the leaves.

11. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Example 3 Continued Step 2: List the stems from least to greatest on the plot. Stems Leaves 12341234 The stems are the tens digits. The data shows the number of years coached by the top 15 coaches in the all-time NFL coaching victories. Make a stem-and-leaf plot of the data. Then find the number of coaches who coached fewer than 25 years. 33, 40, 29, 33, 23, 22, 20, 21, 18, 23, 17, 15, 15, 12, 17

12. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Example 3 Continued Step 3: List the leaves for each stem from least to greatest. Stems Leaves 12341234 The stems are the tens digits. 2 5577 8 0 1 2 3 3 9 3 3 0 The leaves are the ones digits. The data shows the number of years coached by the top 15 coaches in the all-time NFL coaching victories. Make a stem-and-leaf plot of the data. Then find the number of coaches who coached fewer than 25 years. 33, 40, 29, 33, 23, 22, 20, 21, 18, 23, 17, 15, 15, 12, 17

13. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Example 3 Continued Step 4: Add a key and a title. The stems are the tens digits. Stems Leaves 12341234 2 5577 8 0 1 2 3 3 9 3 3 0 The leaves are the ones digits. Number of Years Coached Key: 2 | 1 means 21. 11 coaches coached fewer than 25 years.

14. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots A back-to-back stem-and-leaf plot can be used to compare two sets of data. The stems are in the center, and the leaves for one set of data are to the right of the stems. The leaves for the other set of data are to the left of the stems.

15. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Example 4: 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. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots 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. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots Lesson Quiz: Part I The data shows the ages of some hospital nurses. 33, 35, 23, 39, 23, 24, 34, 21, 57, 45, 57, 60, 45, 24, 31, 42, 61, 45, 35, 38 1. Make a line plot of the data. What age occurs most often? 45 21 23 24 31 33 34 35 38 39 42 45 57 60 61 x x x xxx x x x x xxxxxx x x x

18. Holt CA Course 1 11-1 Line Plots and Stem-and-Leaf Plots The data shows the ages of some hospital nurses. 33, 35, 23, 39, 23, 24, 34, 21, 57, 45, 57, 60, 45, 24, 31, 42, 61, 45, 35, 38 2. Make a stem-and-leaf plot of the data. How many nurses are over the age of 45? Stems Leaves 2345623456 1 3 3 4 4 1 3 4 5 5 8 9 2 5 5 5 7 0 1 Nurses’ Ages Key: 4 | 2 means 42. 4 Lesson Quiz: Part II