1. Stem and Leaf Plots Stem and Leaf Plots emphasize place value.
Stem – largest place value(s) of a number
Leaf – smallest place value of a number
Eg. below - the stems represent the tens digit and the leaves represent the ones
22, 24, 25, 28
30, 31, 33
46, 47
53, 55, 55
Data points are:
(tens)
(ones)
If you count the leaves, you will know how many data points there are.
There are 12 leaves, so you have 12 data points.

2. Stem and Leaf Plots
Put the following values into a stem and leaf plot.
5, 8, 10, 15, 17, 31, 31, 32
(tens)
(ones)
5 8 1 2 3

3. Minimum, Maximum, Range 22 55 33 Minimum = _______ Maximum = _______
minimum point
(tens)
(ones)
Combine the tens and ones = 22
maximum point
Combine the tens and ones = 55 22 55 33
Minimum = _______
Maximum = _______
Range = _______
(55 – 22)

4. Median
Cross out the smallest and highest leaves together until you find the middle value.
If there are 2 middle values, take the average of the 2.
(tens)
(ones)
= 64
64 ÷ 2 = 32 32
Median = _______

5. Median
If crossing out the leaves confuses you, list the data points out first and then cross them off
22, 24, 25, 28, 30, 31, 33, 46, 47, 53, 55, 55
(tens)
(ones)
= 64
64 ÷ 2 = 32 32
Median = _______

6. Remember: This represents 47
Mode
The mode is the value(s) that occurs most often.
(tens)
(ones) 4 7
Remember: This represents 47 47
Mode = _______
Don’t get confused. The mode is not 7 or 77!

7. Stem and Leaf Plots
Sometimes the stem is the ones place and the leaf is the tenths place
Data points are:
2.2, 2.4, 2.5, 2.8
3, 3.1, 3.3
4.6, 4.7
5.3, 5.5, 5.5

8. Construct a stem and leaf plot for the following data.