Answer:
The inter-quartile range is 13.
Explanation:
1. Order the data from least to greatest
2. Find the median of the data.
3. Calculate the median of both the lower and upper half of the data.
4. The inter-quartile range is the difference between the upper and lower medians.
Lower Median: 17
Media: 25.5
Upper Median: 30
Inter-quartile range: 30 - 17 = 13