Divide into groups of four or five students. Each group member should select about 15 other students and first ask them to “randomly” select four digits each. After the four digits have been recorded, ask each subject to write the last four digits of his or her Social Security number (for security, write these digits in any order). Take the “random  sample results of individual digits and mix them into one big sample, then mix the individual Social Security digits into a second big sample. Using the “random” sample set, test the claim that students select digits randomly. Then use the Social Security digits to test the claim that they come from a population of random digits. Compare the results. Does it appear that students can randomly select digits? Are they likely to select any digits more often than others? Are they likely to select any digits less often than others? Do the last digits of Social Security numbers appear to be randomly selected?