Answer: 6.4
Step-by-step explanation: First, let's list out the data set:
0.2, 1.2, 1.4, 3, 6.4, 7.1, 8, 8.4, 9
Okay, so to find the median, we need to find the exact middle of the data set. If it was a data set with 2 numbers in the middle, we would add them up and divide by 2. Fortunately, we have a data set with an exact number in the middle. We have to do nothing more, so therefore 6.4 would be your answer.