The difference between the medians of the two data sets (Highlands and Lowlands) can be calculated by subtracting the median of the Lowlands from the median of the Highlands.
Given:
- Median rainfall for the Highlands = 16 mm
- Median rainfall for the Lowlands = 12 mm
To find the difference: \[ \text{Difference} = \text{Median of Highlands} - \text{Median of Lowlands} = 16 , \text{mm} - 12 , \text{mm} = 4 , \text{mm} \]
Therefore, the difference between the medians of the two data sets is 4 millimeters.