00:01
Assume a population of 2, 4, and 12.
00:02
Assume the samples are size n equals 2 and are randomly selected with replacement from the population.
00:07
Listed below are 9 different samples.
00:09
Find the mean of the sampling distribution of the sample standard deviations.
00:13
So first we're going to find the mean of each of the samples.
00:19
And then we're going to find the standard deviation for each of them.
00:25
Now to do that we need to take the square root of 2 minus the mean squared plus 2 minus the mean squared.
00:39
And that's going to be equal to zero.
00:42
That's going to be the same for all of these.
00:47
So it'll be 4 minus 4 the quantity squared plus 4 minus 4 the quantity squared.
00:53
Which will equal zero.
00:56
12 minus 12 the quantity squared plus 12 minus 12 the quantity squared equals zero.
01:05
This one will be the quantity of 2 minus 3 squared plus 4 minus 3 squared.
01:12
And that's going to give us the square root of 2.
01:18
And we'll get that same thing.
01:23
Let's just go in order.
01:24
So this one here, i didn't give myself much room.
01:27
Sorry about that...