Stem and Leaf Plots
• Stem and Leaf Plots emphasize place value.
• The stems represent the tens digit and the leaves represent the ones
(tens)
(ones)
Data points are:
22, 24, 25, 28
30, 31, 33
46, 47
53, 55, 55
• If you count the leaves, you will know how many data points there are.
• There are 12 leaves, so you have 12 data points.
Stem and Leaf Plots
• Put the following values into a stem and leaf plot.
5, 8, 10, 15, 17, 31, 31, 32
(tens)
(ones)
0
5 8
1
0 5 7
2
3
1 1 2
Minimum, Maximum, Range
(tens)
(ones)
minimum point
Combine the tens and ones
20 + 2 = 22
maximum point
Combine the tens and ones
50 + 5 = 55
22
Minimum = _______
55
Maximum = _______
33
Range = _______
(55 – 22)
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)
31 + 33 = 64
64 ÷ 2 = 32
32
Median = _______
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)
31 + 33 = 64
64 ÷ 2 = 32
32
Median = _______
Mode
• The mode is the value(s) that occurs most often.
(tens)
(ones)
4
7
47
Mode = _______
Remember: This
represents 47
• Don’t get confused. The mode is not 7 or 77!
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