Stem and Leaf Plots.pptx

Statistic

1. St em - and-Leaf Plots Presented by: Alcantara, Michelle R. 

2. Stem-and-Leaf Plot *  Uses place value to organize data . * Shows data in an organized way so it   can be analyzed easily . *  Organizes data so it is easier to find   the median, mode, and range .

3. Here are the scores for a freshman basketball team  Here is the same data organized into a stem-and-leaf plot.

4. Can you tell how the stem-and-leaf plot was made? The first number in the data is 27 . Here is the 2 in the tens place. Here is the 7 in the ones place.

5. The key shows us which place value the digits represent.

6. The stems all represent tens place in this stem-and-leaf plot. The leaves all represent ones .

7. Let’s try one together…

8. Here are one student’s math test scores. Make a stem-and-leaf plot for this data. First, draw the dividing lines.

9. Here are one student’s math test scores. Make a stem-and-leaf plot for this data. Next, label the stem side and the leaf side. S te m s Leaves

10. Here are one student’s math test scores. Make a stem-and-leaf plot for this data. Find the smallest piece of data and plot it on the grid. S te m s Leaves 7 5

11. Here are one student’s math test scores. Make a stem-and-leaf plot for this data. Find the next smallest piece of data and plot it on the grid. S te m s Leaves 7 5 9 The 7 for the tens place is already there. We just add the 9 .

12. Continue with this process until you have entered all the data. S te m s Leaves 7 5 9 8 3 4 6 6 8 9 1 4 9

13. Remember to add a title. Test Scores Stems Leaves 7 5 9 8 3 4 6 6 8 9 1 4 9

14. Don’t forget the key! Test Scores Stems Leaves 7 5 9 8 3 4 6 6 8 9 1 4 9 Key: 7 5 means 75

15. You just completed a stem-and-leaf plot!

16. Now, try it on your own…

17. This table shows the times in seconds and hundredths of seconds for the women’s 500-meter speed-skating competition in the 2002 Winter Olympics.

18. Use this data to make a stem-and-leaf plot. 2002 Winter Olympics 500-Meter Speed-Skating Times in Seconds

19. Check your work… 2002 Winter Olympics 500-Meter Speed-Skating Times in Seconds

20. Using Stem-and-Leaf Plots Boxes of Girl Scout Cookies Sold by Troop 220  What was the least number of cookies sold? 40 boxes

21. Using Stem-and-Leaf Plots  What was the largest number of cookies so ld? Boxes of Girl Scout Cookies Sold by Troop 220 94 boxes

22. Using Stem-and-Leaf Plots  Find the median of the data Find the middle leaf… 63 boxes Boxes of Girl Scout Cookies Sold by Troop 220

23. Using Stem-and-Leaf Plots  Find the mode of the data Look for the number that occurs most often in a row of leaves 63 boxes Boxes of Girl Scout Cookies Sold by Troop 220

24. THANK YOU  FOR LISTENING !!!