The data set for 1 p.m. has 35 numbers, and the number in the middle is 43, making this the median age. Because the data set for 6 p.m. has 35 numbers, and the number in the middle is 18, this is the median age for that time.

So it is more likely that older customers, who will be more likely to be interested in retirement planning, will be at the mall at 1 p.m., which makes it a better time for Vicky to make her presentation.