Question

The following boxplot shows the bicycle sales of two different bicycle brands over a month.


Which bicycle brand shows a greater measure of variation in sales?

• A. Brand A
• B. Both brands
• C. Brand B
• D. Neither of the brands

Answer 1

The correct option is C Brand B


Brand A:
Median sales: $60$
Lower quartile: $58$
Upper quartile: $66$
Interquartile range: $66-58=8$

Brand B:
Median sales: $51.2$
Lower quartile: $50$
Upper quartile: $60$
Interquartile range: $60-50=10$

Since the interquartile range for Brand B is greater than the interquartile range for Brand A, Brand B has a greater measure of variation.