00:01
To conduct a hypothesis test, we need independent observations.
00:05
Jason is going to take a sample size of 35 without replacement.
00:09
What is the minimum population size necessary in order for us to assume these are independent? so let's start with a really small sample.
00:18
Let's say there's only 50 people in the population, and let's say that out of these, 10 of them meet a criteria and 40 of them don't.
00:29
You take your first person for your sample and you have a 10 out of 50 chance of picking someone with this characteristic.
00:37
Now there's only 49 people left, and if you did take that, there's only nine of them that have the characteristic.
00:43
This proportion is pretty different to this one, so if you're doing this without replacement, you really cannot consider them to be independent.
00:54
Now instead, let's say it's 100, 400 and 500...