2. Transparency 5 Click the mouse button or press the Space Bar to display the answers.

3. Splash Screen

4. Example 5-2b Objective Construct and interpret stem-and-leaf plots

5. Example 5-2b Vocabulary Stem-and-leaf plot Data is ordered from least to greatest and is organized by place value LeavesStems

6. Example 5-2b Vocabulary Stems The larger place values of the data set Leaves Stems

7. Example 5-2b Vocabulary Leaves The ones place value of the data set Leaves Stems

8. Example 5-2b Vocabulary Key Explains the stems and leaves 7 is the tens digit 8 is the ones digit 7  8 = 78

9. Lesson 5 Contents Example 1Construct a Stem-and-Leaf Plot Example 2Interpret Stem-and-Leaf Plots

10. Example 5-1a WEATHER Make a stem-and-leaf plot for the data in the table Average July Highs (°F) for Selected European Cities 697271737670 816778897475 746679738877 1/2 Order the data from least to greatest. 66, 67,69, 70, Begin with the smallest number which is 66 Continue with the numbers in the 60’s Do the 70’s in order from least to greatest 71,72,73, 74, 75,76,77,78,79, Do the 80’s in order from least to greatest 81,88,89,

11. Example 5-1b Draw a stem-and-leaf frame which includes a horizontal line Leaf Stem 66, 67, 69, 70, 71, 72, 73, 73, 74, 74, 75, 76, 77, 78, 79, 81, 88, 89 1/2 Then draw a vertical line Label headings with “Stem” on the left and “Leaf” on the right

12. Example 5-1b The stem is the beginning place value of the number which are tens Leaf Stem 66, 67, 69, 70, 71, 72, 73, 73, 74, 74, 75, 76, 77, 78, 79, 81, 88, 89 1/2 6 The next group of numbers have a 7 in the ten’s place 7 The next group of numbers have a 8 in the ten’s place 8

13. Example 5-1b The leaf is the one’s place value digits Leaf Stem 66, 67, 69, 70, 71, 72, 73, 73, 74, 74, 75, 76, 77, 78, 79, 81, 88, 89 1/2 6 7 8 Across from the “6” in the stem, put all the numbers in the 60’s group 6,7,9 Across from the “7” in the stem, put all the numbers in the 70’s group 0, 1,2,3, 4, 5,6,7,8,9 Across from the “8” in the stem, put all the numbers in the 70’s group 1,8,9

14. Example 5-1b Make a key for the stem-and-leaf plot Leaf Stem 1/2 6 7 8 6,7,9 0, 1,2,3, 4, 5,6,7,8,9 1,8,9 Choose a stem number then write “Key” then the stem Key 6 Choose a leaf number on the same row then put a vertical line after the stem then write the “Leaf” number Key 6 7 Put and = sign then write what the key means Key 6 7 = 67

15. Example 5-1b Leaf Stem 1/2 6 7 8 6,7,9 0, 1,2,3, 4, 5,6,7,8,9 1,8,9 Key 6Key 6 7 Key 6 7 = 67 Answer:

16. Example 5-1d Make a stem-and-leaf plot for the data in the table below. Speeds of Cars Driving on the Highway (miles per hour) 65 72 69 58 81 66 61 74 78 70 66 59 74 78 71 68 65 66 6  5 = 65 Answer: 884421 07 18 9866655 16 9 85 LeafStem 1/2 Key

17. Example 5-2a FOOTBALL The stem-and-leaf plot shows the total points scored in Super Bowls I through XXXVI (1967–2002). Analyze the data (means to describe) 5  3 = 53 9 7 9 665432 05 965 16 7765443 14 57 9877731 03 9732 12 LeafStem 2/2 Key

18. Example 5-2a 5  3 = 53 9 7 9 665432 05 965 16 7765443 14 57 9877731 03 9732 12 LeafStem 2/2 The largest number is 75 The smallest number is 21 The range is the largest number - the smallest number Range = 75 - 21 Range = 54 Most of the data is in the 30’s, 40’s and 50’s Key

19. Example 5-2a Answer: Range = 54 Most of the data is in the 30’s, 40’s, and 50’s 2/2

20. Example 5-2b HOTEL RATES The following stem-and-leaf plot shows nightly hotel rates for a sample of hotels in a large metropolitan area. Analyze the data Answer: Range = 33 Most of the data is in the 70’s and 80’s 8  3 = $83 9997643 38 543 19 98554 17 84 26 LeafStem * 2/2 Key

21. End of Lesson 5 Assignment Lesson 2:5Stem-and-Leaf Plots9 - 15 All