Stem and Leaf Plots

1
Stem and Leaf Plots

• Stem and Leaf Plots emphasize place value.
• The stems represent the tens digit and the
  leaves represent the ones

Data points are
(tens)
(ones)
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.

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
0


0 5 7
1
2
1 1 2
3
3
Minimum, Maximum, Range
minimum point
(tens)
(ones)
Combine the tens and ones 20 2 22
maximum point
Combine the tens and ones 50 5 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)
31 33 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)
31 33 64 64 2 32
32
Median _______
6
Mode

• The mode is the value(s) that occurs most often.

(tens)
(ones)
4
7
Remember This represents 47
47
Mode _______

• Dont 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