If we have a population consists of 5 people and their age in years are:
17, 13, 20, 19, 22
Calculate both mean and variance for the wights of this population,
If we select randomly a sample of 2 individuals without replacement, find the mean and and the variance for possible samples.
Calculate the mean and the variance for samples population.
Compare the mean and variance of the samples population with those of original population.