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Stem and Leaf PlotsStem and Leaf Plots
(tens) (ones)
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:
• 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 PlotsStem and Leaf Plots
(tens) (ones)
• Put the following values into a stem and leaf plot.
5, 8, 10, 15, 17, 31, 31, 32
5 8
0 5 7
0
1 1 2
1
2
3
Minimum, Maximum, RangeMinimum, Maximum, Range
Minimum = _______ Maximum = _______ Range = _______22 55 33
(tens) (ones)minimum point
maximum point
(55 – 22)
Combine the tens and ones 20 + 2 = 22
Combine the tens and ones 50 + 5 = 55
MedianMedian
Median = _______32
(tens) (ones)
• 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.
31 + 33 = 64
64 ÷ 2 = 32
MedianMedian
Median = _______32
(tens) (ones)
• 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
31 + 33 = 64
64 ÷ 2 = 32
ModeMode
Mode = _______
(tens) (ones)
• The mode is the value(s) that occurs most often.
4
7Remember:
This represents 47
47• Don’t get confused. The mode is not 7 or 77!
Stem and Leaf PlotsStem and Leaf Plots
• Sometimes the stem is the ones place and the leaf is the tenths place
2.2, 2.4, 2.5, 2.83, 3.1, 3.3
4.6, 4.7
5.3, 5.5, 5.5
Data points are:
Construct a stem and leaf plot for the following data.
2 18 23 14 13 4 5 9 11 1321 3 19 8 16 9 10 3 3 1012 15 4 16 19