Area I Recalled Practice Test

The median is the middle value when data are arranged in order. With five numbers, the median is the third value in the sorted list. The set {1, 2, 3, 7, 9} is already sorted, and the third value is 3, so the median is 3. There are two numbers below it (1, 2) and two above it (7, 9), which fits the idea of the center value.