00:01
So on our first question, we're looking at sodium restricted diets.
00:05
And they took a sample of 55 people with hypertension.
00:09
And they took a sample of 149 people without.
00:13
And these are the proportions of people who are on the restricted diet, sodium restricted diet.
00:20
And we have the pooled pea, adding these two together and adding these two together, is this 60 out of 204.
00:28
And so the test statistic for this we know is to take the difference between the sample proportions divided by the pooled p, one minus the pooled p, and then one over the first sample size plus one over the second sample size.
00:42
And this test statistic comes out to be 2 .709.
00:47
You can use a two proportion z test to get the information for this.
00:51
And when we get that p value, we find out it is very small.
00:57
It is less than a 5 % significance level...