A population consists of 6,9,12,15,18 and 21. Consider all possible samples of size=2

drawn W.O.R from this population.

i) show that mean of the sampling distribution of means is equal to the

population mean.

ii) Find the standard error of the sampling distribution of means.

iii) Sketch the population and interpret.

iv) Sketch the sampling distribution of means and interpret

v) How do we apply Central theorem here?