WEBVTT

1
00:00:02.820 --> 00:00:04.470
<v Instructor>Okay, so we are moving forward</v>

2
00:00:04.470 --> 00:00:05.460
with this problem,

3
00:00:05.460 --> 00:00:07.740
and now we are with problem two,

4
00:00:07.740 --> 00:00:09.977
and we are looking at Part B.

5
00:00:13.710 --> 00:00:16.650
So in Part B, we are being asked

6
00:00:16.650 --> 00:00:18.330
what is the probability

7
00:00:18.330 --> 00:00:21.243
that the child and both parents are hyperlipidemic?

8
00:00:22.290 --> 00:00:24.180
So now we are not concerned

9
00:00:24.180 --> 00:00:26.430
about one parent being hyperlipidemic.

10
00:00:26.430 --> 00:00:30.133
We are only focusing on when both the child

11
00:00:30.133 --> 00:00:32.843
and both parents are hyperlipidemic.

12
00:00:34.230 --> 00:00:37.710
So, for this problem we need to find the intersection

13
00:00:37.710 --> 00:00:40.650
where the child and both parents are hyperlipidemic,

14
00:00:40.650 --> 00:00:44.043
and that will be as you probably figured, 45.

15
00:00:44.880 --> 00:00:48.313
So I'm going to go ahead and highlight 45,

16
00:00:51.090 --> 00:00:53.760
so it will be easy for us to understand.

17
00:00:53.760 --> 00:00:55.863
I'm going to use a different color again.

18
00:00:58.140 --> 00:00:59.910
I'm going to use orange.

19
00:00:59.910 --> 00:01:01.410
So this is 45.

20
00:01:01.410 --> 00:01:03.480
This is the intersection

21
00:01:03.480 --> 00:01:08.480
where both parents and the child is hyperlipidemic.

22
00:01:16.500 --> 00:01:19.830
So we really don't need to perform any new addition

23
00:01:19.830 --> 00:01:21.810
for the numerator.

24
00:01:21.810 --> 00:01:24.000
Now for the denominator, again,

25
00:01:24.000 --> 00:01:26.580
there are no conditions attached.

26
00:01:26.580 --> 00:01:28.833
So the numerator here will be 45.

27
00:01:32.370 --> 00:01:33.960
And our denominator, again,

28
00:01:33.960 --> 00:01:37.920
there is no conditions or stipulations attached,

29
00:01:37.920 --> 00:01:41.550
so that again will be for that entire cohort.

30
00:01:41.550 --> 00:01:44.883
So that again would be what? 223.

31
00:01:45.870 --> 00:01:49.350
And I'm going to again highlight that with green.

32
00:01:49.350 --> 00:01:51.760
So our denominator is going to be

33
00:01:57.450 --> 00:01:59.070
223,

34
00:01:59.070 --> 00:02:02.280
and our numerator is going to be 45.

35
00:02:02.280 --> 00:02:04.863
So we are looking at this.

36
00:02:12.203 --> 00:02:13.453
The probability

37
00:02:14.670 --> 00:02:15.730
that the child

38
00:02:17.520 --> 00:02:19.150
and both parents

39
00:02:23.354 --> 00:02:24.937
are hyperlipidemic.

40
00:02:26.490 --> 00:02:28.773
And we'll just abbreviate that as HL.

41
00:02:30.060 --> 00:02:34.327
So we are going to take 45 and divide it by 223,

42
00:02:36.030 --> 00:02:41.030
and what we are going to get is 0.202, or 20%.

43
00:02:47.130 --> 00:02:49.200
So there is a 20% probability

44
00:02:49.200 --> 00:02:52.350
that the child and both parents are hyperlipidemic

45
00:02:52.350 --> 00:02:56.223
given the values we have been provided.