00:02
Hello, so we have this information from a normal distribution.
00:05
We want to find b such that the probability of negative b less than z less than b equals .964.
00:22
So let's open this up.
00:24
This is going to be the probability of z less than b minus probability of z less than negative b equals 0 .964.
00:40
So we're going to have this right here.
00:45
Now this side is the same as 1 minus the probability of z less than positive b.
01:00
Now if we open it up, let's see what we get.
01:06
We get minus 1 plus probability of z less than b equals 0 .964.
01:20
So now we have two of these, right? so we can add up.
01:25
We're going to have two times the probability of z less than b minus 1 equals 0 .964.
01:36
So the probability of z less than b equals that's going to be 1 plus 0 .964 divided by 2...