00:01
In this question, we're given data for a group of 215 people being tested for disease and no disease.
00:08
And this is the breakdown data for tested positive and tested negative and disease and no disease.
00:15
I'm going to let the event d, the disease, so this would be d.
00:20
And event n is no disease.
00:24
And plus ve as tested positive and minus ve as tested positive.
00:31
Negative.
00:33
So i've totaled up the roll and totaled up the column as well.
00:38
So all will add up to 215 participants.
00:42
So in part one, what is the probability the subject has positive test result and does not have the disease? so we're looking at probability of positive and is intercept and the event end.
00:59
Now in probability n is thumps.
01:02
Notation is intercept, all is plus, notation is union.
01:09
Using the table, you can see positive and n will be this 20.
01:16
So it's 20 out of the total of 215.
01:20
And that will be 4 out of 43 or 0 .093 .04, please.
01:33
All right.
01:33
In part 2, we want to find the probability has negative test...