1. Box-and-Whisker Plots
Name __________________________ Math
Box-and-Whisker Plots
Box-and-whisker plots show the distribution of data. 10 20 30 40 50 60 70 A B C D E F
A is an outlier. Outliers are extreme values (appears to be #7 in this plot).
B is the least value if there is not an outlier (35).
C is the lower quartile. 25% of the data is below this value (40).
D is the median. 50% of the data is both above and below this value (50).
E is the upper quartile. 75% of the data is below this value (55).
F is the greatest value (70).
The range is the difference between least and greatest values (70 – 35 = 35).

2. Interpret Box-and-Whisker Plots
Which store had the least sales of skateboards?
Which store had a greater range in sales of skateboards?
Which store had a median of 35 skateboards sold?
What is the lower quartile for Mia’s Sports?
What is the upper quartile for Sports Stuff? 10 20 30 40 50 60
Mia’s Sports
Sports Stuff
Skateboards Sold