*see attachment for the diagram of the two box plots referred to here.
Answer:
2 inches
Explanation:
The median of a box plot is the data value that lies exactly where the vertical line divides the box into two.
Therefore:
Median for Class 1 = 17 inches
Median for class 2 = 15 inches
The difference in the medians of both box plots = 17 - 15 = 2 inches