- AThe mode, because it names the size that was asked for most often
- BThe mean, because it uses every sale in the record
- CThe median, because it is not disturbed by unusually large sizes
- DThe range, because it shows how widely the sizes vary
Step-by-Step Solution
The owner needs the size the greatest number of customers ask for, and that is exactly what the mode reports. A mean shoe size could come out as something like 7.4, which is not a size he can stock at all; the median gives the middle size rather than the most popular one, and could easily be a size that hardly anyone buys; and the range only tells him the smallest and largest sizes he must carry, saying nothing about how many of each to order.
Answer: A) The mode, because it names the size that was asked for most often