Each student states the last four digits of their Social Security number. For privacy concerns, those four
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Each student states the last four digits of their Social Security number. For privacy concerns, those four digits can be given in any order. Construct a dotplot of the digits. What is the distribution of those digits? What value is the approximate center of the distribution? Then, each student calculates the mean of their four digits. Construct another dotplot for these means. What is the distribution of the means? What value is the approximate center of the distribution? Compare the variation in the original dotplot to the variation in the dotplot representing the sample means. What conclusions follow?
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