Stem and Leaf Plots/Diagrams
2
Stem and Leaf Plots/Diagrams A stem and leaf plot is a frequency diagram in which the raw data is displayed together with its frequency. The data is then placed in suitable groups. Example . The following data gives the marks out of 60 for a maths test. Place the data in a stem and leaf diagram. 28, 38, 42, 5, 13, 23, 14, 38, 56, 20, 32, 47, 58, 3, 18, 19, 42, 48, 29, 14, 24, 28, 50, 31, 35 Stem Leaf 0 1 2 3 4 5 3 5 3 4 4 8 9 0 3 4 8 1 5 8 8 2 2 7 8 8 9 0 6 8 2 0 – 9 10 - 19 20 – 29 30 – 39 40 – 49 50 – 59 ten s units Median is the 13 th data value
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Stem and Leaf Plots/Diagrams. A stem and leaf plot is a frequency diagram in which the raw data is displayed together with its frequency. The data is then placed in suitable groups. The following data gives the marks out of 60 for a maths test. Place the data in a stem and leaf diagram. - PowerPoint PPT Presentation
Transcript of Stem and Leaf Plots/Diagrams
Stem and Leaf Plots/Diagrams
A stem and leaf plot is a frequency diagram in which the raw data is displayed together with its frequency. The data is then placed in suitable groups.
Example.
The following data gives the marks out of 60 for a maths test. Place the data in a stem and leaf diagram.
28, 38, 42, 5, 13, 23, 14, 38, 56, 20, 32, 47, 58, 3, 18, 19, 42, 48, 29, 14, 24, 28, 50, 31, 35
Stem Leaf
0
1
2
3
4
5
3 5
3 4 4 8 9
0 3 4 8
1 5 8 8
2 2 7 8
8 9
0 6 8
2
0 – 9
10 - 19
20 – 29
30 – 39
40 – 49
50 – 59
tens units
Median is the 13th data value
Stem and Leaf Plots/Diagrams
The stem and leaf plot below shows the masses in kg of some people in a lift.
(a) How many people were weighed?
(b) What is the range of the masses?
(c) Find the median mass.
Stem Leaf
3
4
5
6
7
8
1 4
3 3 6
0 3 4 8
1
2 2 7
1 6
2
tens units
(a) 16 people.
(b) 86 – 31 = 55 kg
Median is the mean of the
8th and 9th data values.
(c) 56 kg
