1. **State the problem:** Find the median of the data set: 8, 8, 11, 11, 8, 9, 7, 7, 7, 7, 7, 7, 10. 2. **Sort the data:** Arrange the numbers in ascending order: $$7, 7, 7, 7, 7, 7, 8, 8, 8, 9, 10, 11, 11$$ 3. **Count the number of data points:** There are 13 numbers. 4. **Find the median position:** Since 13 is odd, the median is the middle number at position $$\frac{13 + 1}{2} = 7$$. 5. **Identify the median:** The 7th number in the sorted list is 8. **Final answer:** The median is **8**.