00:01
We want to identify the sampling techniques used in two questions here.
00:05
So i'm going to list the sampling techniques you need to know about, and that'll make it easier for us to recognise them.
00:11
So there's simple random sampling, there's systematic, stratified, fluster, and convenience.
00:35
So we'll start with convenience.
00:36
Convenience is just doing whatever is easiest.
00:40
So you don't usually get a representative sample, of your population, but it will be something like posting a survey online and just letting anybody who wants to answer, or stopping people in a busy mall and interviewing them on the spot.
00:56
Really easy to do, but no attempt to be random and unlikely to be representative.
01:03
Simple random is you get a list of your entire population and you just pick from that population.
01:10
So straight from the population.
01:18
Stratifies and cluster, you do something to a population before you take a sample.
01:24
And both of them involve splitting your population into groups.
01:29
And you split them based on some kind of characteristic.
01:32
Depending on your group, it might be the school they go to, like here.
01:36
It might be their age, their income, and so on...