Now, consider the (exact) sampling distribution, Sn,N , of the standard deviations, sXn,N , of simulated SDMs. Figure 5 illustrates Sn,N for N = 100 samples of size n = 5, n = 15, and n = 30 taken from the Mira Beach incomes. That is, each of the values in the histograms in Figure 5 is the standard deviation of a simulated SDM constructed with N = 100 values randomly selected from Xn . A vertical line representing the standard deviation of the SDM,