00:01
5 % of the population has a particular genetic mutation, and 800 people are randomly selected.
00:09
So we have n equals 800, number of people we're looking at, and we have p equals 0 .05.
00:19
We want the standard deviation for the number of people with the mutation.
00:24
Okay, so where do we even begin here? well, what kind of distribution are we looking at? we have a set number of trials, which is each person.
00:32
They're going to be independent.
00:34
Each person has a 5 % chance of having mutation.
00:37
They don't affect each other.
00:39
And there's only two outcomes.
00:40
You have it or you don't.
00:42
So this is a binomial distribution...