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