Stem and-leaf plots

1. Stem-and-Leaf
Plots
Susan Phillips
Lee’s Summit, MO

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.
Stems 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.
Stems 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.
Stems Leaves
7 59
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.
Stems Leaves
7 59
8 34 6 6 8
9 1 4 9

13. Remember to add a title.
Stems Leaves
7 59
8 34 6 6 8
9 1 4 9
Test Scores

14. Don’t forget the key!
Stems Leaves
7 59
8 34 6 6 8
9 1 4 9
Test Scores
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
What was the least number of cookies sold?
Boxes of Girl Scout Cookies Sold by Troop 220
40 boxes

21. Using Stem-and-Leaf Plots
What was the largest number of cookies
sold?
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. Stem-and-Leaf Plots
The
End