Box and Whisker Plot

1
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Look at data from example 1, page 613
2
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Look at data from example 1, page 613
3
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Look at data from example 1, page 613
4
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Look at data from example 1, page 613
The median is toward the middle of the box, so
the data is evenly distributed
The box is not very wide, so the data is fairly
constant
Half the values are within 7 units of the median
5
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617

• The least and greatest values show the range

2. The width of the box shows how consistent the
data is

• A wide box shows very inconsistent data
• A narrow box show very consistent data

3. The location of the median shows the
distribution of the data

• Towards the middle means even distribution
• Towards the sides shows uneven distribution

6
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Sample test scores
7
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Sample test scores
8
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Sample test scores
Half the values are within 27 units of the median
9
Box and Whisker Plot
Chapter 12 Sec. 2 Pages 613 to 617
Sample test scores
The median is toward the right of the box, so the
data is unevenly distributed
The box is wide, so there is a lot of variety in
the data.