00:01
Hi, i'm david and i'm here to help you answer your question.
00:03
Now let me bring up your question here.
00:06
In this question here we are going to discuss about the confident interval for the proportion.
00:13
Let me remind you that the confidence interval for the p, it will be the point as main p heart plus and minus the merging of the error.
00:22
When the merging of the error, it will equal to the z and 4 over 2, times square root and the p heart times 1 minus the p heart, the value.
00:30
By n.
00:31
Now if we have no information about the proportion, we will send the phex equal to the 0 .15 in order to find the sum of size.
00:40
Now in this question we want to find the somersize such that we have the merging of the error, it will equal to 5%, 0 .05, and the 90 % confidence.
00:52
It means that we can find the zan4 over 2...