Data is the raw "stuff" that is analyzed to create statistics. They both come in several forms: numeric (or quantitative), spatial, and qualitative (includes interviews, opinion data).
DATA:
STATISTICS:
There is some semantic overlap between the two terms, so don't be surprised to hear the same figure referred to as data or a statistic. Plus, one person's statistic (interpreted data) may in turn be someone else's data, to be re-interpreted and used for a different purpose! Don't worry too much about the terminology--the important point is:
If you need a quick figure or single fact, check existing statistics first.