To gather data on a 1200-acre pine forest in Louisiana, the U. S. Forest Service laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of 10% of the plots selected using this method: 1. Number the plots from 1 to 1410. 2. Use a random number generator to select 141 different integers from 1 to 1410. 3. Select the corresponding 141 plots.