00:01
We are given some information on probabilities concerning screening of applicants.
00:06
I'm going to try to display this data with a tree diagram.
00:12
So first of all, do they pass or do they fail the test? we are told that 60 % pass the test, so probability of passing is 0 .6, probability of failing 0 .4.
00:25
Then we have whether or not they get through training successfully.
00:32
So training, and i'll do t -dash for no training, unsuccessful.
00:38
If they pass the test, the probability of completing training successfully is 80%.
00:43
Okay, and in an experiment, a random sample who do not pass the test are employed.
00:52
50 % of those successfully complete training, so 50%.
00:58
So 20 % pass but don't finish training, 50 % fail and don't finish training, and then don't finish training.
01:05
Rather, 50 % of those who fail do not finish training.
01:10
I don't want to claim it's an intersection when it's conditional probability...