Amount of Laundry Washed Each Year Procter & Gamble
Chapter 6, Problem 19(choose chapter or problem)
Amount of Laundry Washed Each Year Procter & Gamble reported that an American family of four washes an average of 1 ton (2000 pounds) of clothes each year. If the standard deviation of the distribution is 187.5 pounds, find the probability that the mean of a randomly selected sample of 50 families of four will be between 1980 and 1990 pounds. 0.1254 (TI: 0.12769) Source: The Harpers Index Book.
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