00:01
Hello, so let's look at the first one here.
00:03
So we have two z values.
00:05
We're trying to find those values.
00:07
What is negative z? this is positive z.
00:11
This is the area.
00:14
Okay, and that area is 0 .95.
00:25
So what this means is that the probability of negative z less than z is 0 .95.
00:39
So let's open up this bracket.
00:41
So probability.
00:42
So z less than z minus the probability of z.
00:48
There's a negative z at 0 .95.
00:54
So that's how we open up the bracket.
00:57
Now, let me repeat the one on the left.
01:03
Now on the right, this is the same as 1 minus the probability of z less than z.
01:17
So you see, so this negative is no more there.
01:22
So i have barman with that.
01:23
So if you open up the bracket, you're going to have probability of z less than z minus 1 plus probability of z less than z equals 0 .95...