WEBVTT
1
00:00:00.040 --> 00:00:02.950 A:middle L:90%
it's this question asked you, ah, to spot
2
00:00:02.950 --> 00:00:06.389 A:middle L:90%
them steaks in this high pots his test, and
3
00:00:06.389 --> 00:00:09.500 A:middle L:90%
the first mistake that should stick out is, um
4
00:00:09.509 --> 00:00:12.750 A:middle L:90%
, we see that H O is given as p
5
00:00:12.759 --> 00:00:16.870 A:middle L:90%
equals 0.75 which is right. That's what you're no
6
00:00:16.870 --> 00:00:18.690 A:middle L:90%
Apophis. It should be. But your old kind
7
00:00:18.690 --> 00:00:21.350 A:middle L:90%
of politics system should never have a value that is
8
00:00:21.350 --> 00:00:27.370 A:middle L:90%
different. Some the null hypothesis that should not be
9
00:00:27.370 --> 00:00:29.469 A:middle L:90%
0.7 on seven. That doesn't make any sense,
10
00:00:29.469 --> 00:00:32.149 A:middle L:90%
right? That's what about values in between these two
11
00:00:32.579 --> 00:00:34.030 A:middle L:90%
. All right, so it's gonna be P is
12
00:00:34.030 --> 00:00:38.750 A:middle L:90%
greater than 0.75 And so this changes are busy statistic
13
00:00:39.140 --> 00:00:44.280 A:middle L:90%
which we're going to calculate by, um, doing
14
00:00:44.289 --> 00:00:49.590 A:middle L:90%
the, um, one that we observed are observed
15
00:00:49.590 --> 00:00:56.350 A:middle L:90%
value, which is 10.797 with 97 minus point 75
16
00:00:56.359 --> 00:01:00.310 A:middle L:90%
Divided by our standard deviation, which is also calculated
17
00:01:00.310 --> 00:01:03.859 A:middle L:90%
wrong. I know that the standard deviation is P
18
00:01:04.060 --> 00:01:12.109 A:middle L:90%
becomes one minus the over and and it's the square
19
00:01:12.109 --> 00:01:19.840 A:middle L:90%
root of that whole value. So if you see
20
00:01:19.840 --> 00:01:25.659 A:middle L:90%
how they did it, they used the 0.797 times
21
00:01:25.659 --> 00:01:26.290 A:middle L:90%
0.2 of three. But you actually want to use
22
00:01:26.290 --> 00:01:30.349 A:middle L:90%
30.75 point 25 and then used it for 45.
23
00:01:30.840 --> 00:01:37.129 A:middle L:90%
Um, but is it for 45? No,
24
00:01:37.129 --> 00:01:40.359 A:middle L:90%
you're an is 558 students. This is gonna be
25
00:01:40.359 --> 00:01:45.099 A:middle L:90%
5 58 This is gonna be point to 5.75 and
26
00:01:45.099 --> 00:01:48.670 A:middle L:90%
this is gonna be point to five. So those
27
00:01:48.670 --> 00:01:49.469 A:middle L:90%
are the mistakes, and those are going to change
28
00:01:49.920 --> 00:01:53.469 A:middle L:90%
the values that you get. You also want to
29
00:01:53.469 --> 00:01:56.010 A:middle L:90%
make sure if you're doing P is greater than 0.75
30
00:01:56.010 --> 00:01:56.409 A:middle L:90%
it's not.