Final answer:
To find the median of the given data set, arrange the numbers in ascending order and calculate the average of the two middle values, resulting in a median of 4.95.
Step-by-step explanation:
The question requires us to find the median of the data set: 6.5, 3.4, 8.6, 2.9. First, arrange the numbers in ascending order: 2.9, 3.4, 6.5, 8.6. Since there are an even number of values (4 in this case), the median is the average of the two middle values. Therefore, the median equals (3.4 + 6.5) / 2, which is 4.95.