A population of N = 5 has values 26, 21, 20, 28, and 24.
If a sample size 3 is taken, n = 3, there will be 10 possible samples. They are listed
below.
26, 21, 20
26, 21, 28
26, 21, 24
26, 20, 28
26, 20, 24
26, 28, 24
21, 20, 28
21, 20, 24
21, 28, 24
20, 28, 24
What is the mean of all 10 possible sample means?