00:01
We're looking at a normal distribution.
00:03
What is the area under the curve between minus 2 .36 and 2 .36.
00:09
So let's draw that out.
00:11
This is a normal curve.
00:13
And minus 2 .36 as a z score is somewhere far below the mean, 2 .36 far above the mean.
00:21
And because these are the same absolute value, they're actually the same distance from the mean.
00:26
So if i have this here, alpha, this is also alpha.
00:32
So we can split this up into two symmetric portions here.
00:36
And we won't be interval.
00:38
How do we go about calculating it? well, you need either a z score table or a graphical calculator or some other form of technology like excel.
00:47
And you take those and you use the z score of 2 .36 or minus 2 .36.
00:54
And if you use a z score table, it will give you alpha and you will double it.
01:00
So let's start by doing that...