The two measurements of the data are the median and mean from question 4. It's asking you which one, the median or the mean, is better used to describe the number of kilometers Ciara ran. Is 7 (the mean) a number that better shows how much she ran in the past 14 days? Or is 5 (the median) better?
You can try answering it, but just in case, here's my answer :)
The mean is better because it shows the average number of kilometers she ran. The mean takes into account the insane 15 and 16 km she ran on those two days. The median is simply the middle value of her numbers and doesn't tell you much, other than she ran a few days under/at 5 miles and a few days above/at 5 miles. She could have ran three 7 mile days, instead of 11, 15, and 16 miles, but who knows? You can't tell with median.
