00:01
Hi, i'm david and i'm here to help you answer your question.
00:03
Now let me bring up your question here.
00:06
In this question i want to summarize it by the three diagram.
00:11
So at the beginning we will have the probability that a person has certain disease equal to 0103.
00:18
So i will have two event disease and not disease i will put a complement here.
00:24
The corresponding probability disease will be the 0 .03.
00:28
The complement of that equals 0 .97.
00:33
And now with those people having the disease, they will do the test and it turns out to be positive and negative.
00:41
Here's the same thing, positive and negative.
00:43
Now for those people having the disease, and then the probability that the test will be positive will be 0 .88.
00:54
So the complement will be 0 .1 .2.
00:58
Now for those people they don't have the disease and then the probability to have the positive test equal to the 0 .01 and the common will be 0 .99...