00:01
In this problem, we are given four number of samples and we have to find the one whose value for the standard error of the mean.
00:11
This will be smallest.
00:14
So the first sample that's given to us, the size of the sample here is 25 and the standard deviation, well this is equal to 100.
00:22
So let's use this formula and find the standard error of the mean here.
00:27
So this will be 100 divided by square root of 25 and this comes out to be 20.
00:33
And in the next part, we are given the size of the sample as 25 and the standard deviation here, this is 400.
00:43
So the standard error, let's represent this with epsilon 2, this will be 400 divided by square root of 25.
00:51
And we see that this simplifies to 80.
00:54
And in the next part, we are given the size of the sample as 100 and the standard deviation, even this is equal to 100...