An article discussed radiation therapy and new cures from the therapy, along with the harm that could be done if mistakes were made. The following tables represent the results of the types of mistakes made and the causes of mistakes reported to the New York State Department of Health from 2001 to 2009:

a. Construct a bar chart and a pie chart for the types of
b. Which graphical method do you think is best for portraying these data?
c. Construct a Pareto chart for the causes of mistakes.
d. Discuss the "vital few" and "trivial many" reasons for the causes of mistakes.