00:01
Hi, i'm david and i'm here to help you understand 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 confidence interval for the proportion.
00:11
Let me remind you that there is one formula we'll help to find the sum of the size needed for the confidence interval for the proportion.
00:18
When the n equals to the z and 4 over 2, times square root under p heart, 1 minus the p heart over the merging of the error totally square.
00:28
In this question here, we're given the p -hod equal to the 44%, which is 744.
00:35
We're given the merging of the error, it will be within the 2%, which is equal to the 0102, and the 95 % confident, then we can find the zn4 over 2.
00:48
And at the 95 % confidence and 5 % divided by 2 equal to the 2 .15 % which is equal to the 01025.
00:55
It will look at the z table, this value equal to the 1 .96.
01:00
With this information, we will be able to find the n equal to z n4 over 2, times square root of the 0 .44, 1 minus 0 .44, dividing by the merging of the error 0 .02 totally square...
