"Informative" is the adjective form of "information". What's the adjective form of "data"/"datum"?
How about statistical?
I realize it's not the same root word, but my dictionary1 shows a credible thread:
statistical (adjective): of or relating to the use of statistics
statistics (plural noun): the practice or science of collecting and analyzing numerical data in large quantities, esp. for the purpose of inferring proportions in a whole from those in a representative sample.
statistic (noun): a fact or piece of data from a study of a large quantity of numerical data
So long as the data is numerical or quantitative, at least, that word seems to work (although it might be more of a stretch if applied to, say, demographical data.)
1(Definitions from NOAD; emphasis added.)
Perhaps the term "data-driven" might be apt?
based on or decided by collecting and analysing data
• We use a data-driven approach: all decisions are based on careful consideration of the evidence.