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 the question here, let me summarize the question by the table of the frequency.
00:13
And here we will have this one will be the yes and no for the wearing the helmet and then we have the helmet entry.
00:25
That will be on the row will be the head entry.
00:30
So that will be the entries here.
00:36
And then this will be the yes or this one will be the no so let me say this again this will be the entries and then on the top here will be wearing the helmet or not and then the answer here will be yes and no and here we will have the total this is also the total and here we have the total count for the head injury yes we will equal to the 17 this one will be the 2 -18 and the total will be the 2 -35 and this one will have it will be the 130428 and this will be the 5 58 and the total will be the 147 -66 and the end will be the 793 and that will be the summary of the question now we will have the question here asked to calculate the probability the first one here asking to find the probability that the person suffered a head injury given that the person was wearing the helmet.
02:13
So once you find the probability of the head entry and given that the person was wearing the safety helmet.
02:26
So given the s arch and this one because given that they wear the helmet we will have this one will be given that so we divide by the 147 among the 147 people wearing the helmet the number of getting the head injury equal to the 17 and then we turn the 17 we divide by the 147 then again equal to the zobon 1156 and then the next one i'm going to find the probability that the person was wearing the helmet given that the person suffered from the head injury.
03:02
So if you find the probability that when the safety helmet given that they have the head injury.
03:11
So because we know that they suffer from the head injury, the total will be the 2 35, among the 235 suffer from the head injury.
03:21
The numbers are wearing the helmet equal to the 17.
03:27
So 17 divided by the 235 equal to the zbonzo 7 to 3.
03:35
And the next one, 1 to 5 explain what is wrong with the falling statement.
03:40
The probability that the person suffered a head injury and was wearing the safety helmet...