00:01
So in the first part of this question, we should give the point estimate for the specific sample.
00:06
So the point estimate is the simple meaning that we have for this specific sample.
00:11
So the point estimate here is given to be 30 and pg.
00:16
So this will be the answer for the first part.
00:18
For the second part, we should compute what is the margin of error here.
00:24
So the margin of error is given by, in this case, because the sample size here, here is greater than 30, we are going to use this formula here.
00:35
But just because the sample size is greater than 30, so because the sample size is greater than 30, we're going to put the z value here that i'm going to explain how we can find this number, multiply by the standard deviation that they computed using the sample, divided by the square root of n.
00:54
So this is the margin of error.
00:56
So this z here depends on the confidence level, that we want.
01:01
So basically, we want a 99 % confidence interval...