00:01
Find the z value or the z of alpha over two value for a confidence level of 85%.
00:06
So the first thing we need to do is take this 85 % and subtract it.
00:11
So we're actually looking at 0 .15.
00:14
Okay? so now we're going to take that value and we're going to, and we're going to divide it by 2.
00:21
So we're going to go 0 .15 divided by 2 and we're going to get 0 .075.
00:27
That's actually what we're looking for here is that z, 0 .1 .5.
00:30
And we're going to now that means that 7 .5 % are going to be above that level of whatever that value in our normal curve.
00:42
In other words, we're looking at how this is going to be 7 .5%.
00:47
So we need to find this value here on our z table.
00:51
Well, remember that we're looking at the z table gives us the values below that line...