The U.S. Environmental Protection Agency publishes figures on solid waste generated in the U.S. Suppose that during a year, the daily amount of solid waste generated per person was normally distributed with a mean of 3.58 pounds and a standard deviation of 1.04 pounds. c) At least how much a person must be producing to be in the top 10% of solid waste producers? Solution (X - mean)/ = 1.28 (X-3.58)/1.04 = 1.28 X = 1.28 * 1.04 + 3.58 = 4.9112 pounds daily.