00:01
We will be assuming that the proportion of republicans and the proportion of democrats are basically equal on whether they favor lowering the standard for that environmental standard for whatever that cause was.
00:14
And alternately, that the democratic proportion is higher in favoring, lowering that standard.
00:23
Now, you may want greater than are equal to here, but generally speaking, i have my students put just that equality.
00:30
And they are using a 2 % significance level here.
00:35
So a 2 % level.
00:37
And so let's just find that tail right now.
00:41
And so we want to put all 0 .02 in this tail.
00:45
And that would correspond with the z value that's negative.
00:48
And 2 % in that upper tail is 2 .054.
00:54
So we're going to have negative in that low area.
00:57
And we're going to have the reject the null if we are down this way.
01:00
And we would fail to reject on the other side.
01:03
So let's get our proportions.
01:04
Our proportion for the republicans came out as 200 out of 1 ,000.
01:12
And we have our proportion for the democrats was 168 out of 800...