To me, all these terms have to do with statistics, so maybe you could use the word statistics instead of data set data?
I don't really use the term "data set" myself, but statistics would be, like, 17% of people who see Brokeback Mountain become lifelong Brokies. Or, in a cute little town near here that became fashionable, the median home value has increased from $96,000 in 1990 to $739,000 in 2022 (from a website that for some reason does not adjust for inflation).
Or my favorite, which a friend has on his profile on Facebook, "People who confuse correlation with causation all die eventually." A personal favorite because I hate it when people confuse correlation with causation.
I guess in other words, data sets are a bunch of numbers, MEAN and MEDIAN are ways of calculating the relationships between those numbers, statistics are the information the calculations reveal.