Elementary Statistics and Probability

1. Stem-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.
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 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.
Stems 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. 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.
ACTIVITY
Now, try it on your own. Make a Stem and Leaf Plots.

17. THANK YOU
FOR LISTENING
!!!