00:01
Part of this problem we have that your manager learned all about databases and frequently makes queries such as what fraction of our customers who bought a product in the last six months are female and live within five miles of the store.
00:13
He says that he has data mining.
00:15
Is he right? explain.
00:17
Okay, well, so we have our database, right, of all of our customers.
00:25
So we would call that maybe a sample space in mathematical terms.
00:28
We have our sample space s.
00:32
Well, and then we'll just say like that's our whole thing.
00:35
Well, inside of that, we're saying, okay, how many of those bought something in the last six months? and then we're saying, okay, how many of those are female and how many of those live within five miles of the store? so what he's doing is engaging in what's called olap database queries.
00:59
Right...