To make a Stem and Leaf Plot:
The
data (AGEDEATH) used in this example can be found in the Minitab folder under
STUDNT14. The first three lines of the data are below.
|
Day |
Month |
Gender |
Birthplace |
Age |
|
3 |
1 |
Male |
MA |
87 |
|
5 |
1 |
Male |
NJ |
83 |
|
31 |
12 |
Male |
NY |
42 |
|
. |
. |
. |
. |
. |
1.
Go to the Graph pull down menu and select Stem and
Leaf. The following graphic will appear.
2.
Select C2 by double clicking on it. It will appear in the Variables box. Hit O.K.
The following stem and leaf plot should appear in the session window.
Stem-and-Leaf Display: Day
Stem-and-leaf
of Day N = 151
Leaf Unit =
1.0
6 0 111111
20
0 22222233333333
29
0 444455555
41
0 666666667777
53
0 888899999999
64 1 00000111111
75
1 22222233333
(6) 1
445555
70
1 66666666777
59
1 88888999999
48
2 00111111
40
2 222222233333
28
2 44445
23
2 66677777
15
2 888899
3.Notice
that this is a little different then what we saw in class. There is an extra
column of numbers. When you are trying to determine the numbers in the data,
ignore the first column. For instance, the lowest number in this data set is
83.4 which comes from the first column of numbers. Remember to use the Leaf
unit to help you revive numbers from the stem and leaf plot.
Changing
the Leaf Unit
The
above stem and leaf plot uses an increment of 2. If you want to change the
increment to be more compact, fill in the box for increment. For instance the
below stem and leaf plot has an increment of 5.
Stem-and-Leaf Display: Day
Stem-and-leaf
of Day N = 151
Leaf Unit =
1.0
24 0
111111222222333333334444
53 0
55555666666667777888899999999
(24) 1
000001111112222223333344
74 1
55556666666677788888999999
48 2 001111112222222333334444
24 2
566677777888899
9 3
000011111