Consider the data set on page 275 in this section that consists of 400 yes and no responses to a survey question. Discuss methods for selecting a random sample from this population. Work with a group of friends (or your whole class), and have each person select a random sample of n = 10 responses from the population and find the proportion of yes responses for his or her sample. 

Find the mean of the individual sample proportions and compare it to the population proportion of 0.6. Repeat the process with samples of size n = 20. How does the mean of the sample proportions compare to the population proportion?