00:01
Hi, i'm david and i'm here to have you answered your question.
00:03
Now let me bring up your question here.
00:06
In two questions we are going to discuss about the confidence interval for the difference between the two proportion.
00:13
Let me remind you that the competence interval for the p1 minus the p2.
00:21
It will be the p hod 1 minus the p hod 2 plus and the minus the z and 4 over 2 times the square root of the n1 the p hath 1 times 1 minus p hod 1 over n1 plus p h2 times 1 minus p h2 over the n2 now in this question here we want to constrict the 95 % covenant interval so first thing we can find will be the g n4 over 2 and 5 % divided by 2 equal to the 2 .5 % which is equal to the 0 .025.
01:02
It will look at the z table, this value equal to the 1 .96.
01:07
Now we are given the b 1 1 equal to the 30 % 0 .3, and we have the n1 equal to the 240.
01:18
P .h2 equals to the 41%, and then n2 equal to the 200.
01:25
And from here we have all the information we need to write down the 95 % confidence interval.
01:33
For the p1 minus the p2...