Sampling from the population. Olesen, Butterworth, Leach, Kelaher, and Pirkis (2013) selected a sample of 8,315 respondents from a population of about 22 million people who live in Australia to study the effects of mental health on employment status.

(a) Set up the calculations used to determine how many possible samples of 8,315 respondents are possible from this population of 22 million people using theoretical sampling.

(b) Would more samples be possible if the researchers used experimental sampling?