List all 4 possible SRSs of size n = 3, calculate the proportion of red cars in the sample, and display the sampling distribution of the sample proportion on a dotplot with the same scale as the dotplot in Exercise 19. How does the variability of this sampling distribution compare with the variability of the sampling distribution from Exercise 19? What does this indicate about increasing the sample size?

The small population of 4 cars listed in the table.

Color .................... Age (years)
Red ..................................... 1
White ................................. 5
Silver .................................. 8
Red ................................... 20

Exercise 19.

List all 6 possible SRSs of size n = 2, calculate the proportion of red cars in the sample, and display the sampling distribution of the sample proportion on a dotplot. Is the sample proportion an unbiased estimator of the population proportion? Explain your answer.