The boxplots show the age of people involved in accidents according to their role in the accident. 
a. Which role involved the youngest person, and what is the age?
b. Which role had the lowest median age, and what is the age?
c. Which role had smallest range of ages, and what is it?
d. Which role had the largest IQR of ages, and what is it?
e. Which role generally involved the oldest people? Explain.
Definitions:
Statistical Process Control
A method of quality control which uses statistical methods to monitor and control a process.
Small Samples
Investigations or analyses that involve a relatively small number of observations or data points, which may require special statistical techniques to infer conclusions.
Actual Dimensions
The measured size or extent of an object, as opposed to its designed or expected dimensions.
Process Control
The use of information technology to control a physical process.
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