Yes, that is statistics you will go through in uni - however, for a stats major, what rachel described above is pretty much umm... 20% of your basic stats course. The rest of it gets quite mathematical and... to me, at a level of difficulty that could stump you for a bit.
More advanced stats go on about probability distributions, inference, theory of sampling and how to mathematically determine things like the bias of estimators you use to estimate your data, etc. etc. Statistics is basically the organisation of data, you have data - and you're going to make it useful for someone.
Though since you're going to UNSW, you don't actually do that stats course I described until second year. For stats, you should be fine with MX1.
Workload is... acceptable. If you keep up with it.