From a population consisting of 20, 28, 32, 38, and 40, a sample of size 2 will be selected without replacement. a) List down all the possible sample of size 2 without replacement and find the mean of...

From a population consisting of 20, 28, 32, 38, and 40, a sample of size 2 will be selected without replacement.


a) List down all the possible sample of size 2 without replacement and find the mean of each sample.
b) Give the probability distribution of the sample mean, x̄.