00:01
So in this question item a, we should identify the sample and the population.
00:04
The sample, we should just look at the sample that we have.
00:09
So they are saying, for example, that the sample here is these children, the number of people, the number of children they selected.
00:16
So the 384 children.
00:18
We don't know from where they are, but we know that they are children.
00:23
This is the number.
00:24
So when we know that this is the sample, we can say that the population here, is basically the generalization of this.
00:33
Instead of building a number, we're going to say all children.
00:37
Okay.
00:39
So that's it.
00:40
Now, what we want to test is basically if the number, proportion, percentage of children that had autism is larger than before.
00:52
Okay? because they are saying that there is some chemicals that they could increase the number of people which have.
01:02
Autism.
01:03
So basic, what we want to compute is if the proportion now is greater than the 5 % as it was in 1980s, or if it is not greater, stays the same or this is smaller...