00:01
This is the question we have here.
00:02
There's a table.
00:03
There's an outcome a and outcome b, and there are two groups, group one, group two.
00:09
So in the first part of the question, what proportion of all cases? be careful.
00:15
There is given in all cases here.
00:17
Had the outcome of a here.
00:20
So when we look at the outcome of a, which is totally, that is 70 here.
00:27
Since we are looking for the proportion in all cases.
00:32
So the total number of case here, which is 200.
00:35
So the proportion here, which is 30 plus 40 and divided by 200, that would be 70, which is 35 over 100, which is equal to 0 .35.
00:49
This is the answer for part a.
00:52
And what proportion of all cases? so in this case, we need all cases again.
00:57
So let me just write the proportion here.
01:02
Since it was saying that it is in all cases, so we have to just take care of all the outcomes here.
01:10
And we have to look at the group one here.
01:13
So when we look at the group one, we have 30 plus 70.
01:18
So this is 30 plus 70, which is this is 50 over 100.
01:24
If i just simplify, so we will just write 0 .5.
01:27
That is the answer for part b.
01:30
Let's take a look at the part c.
01:32
What proportion of cases in group 1? so be careful...