The U.S. Bureau of Mines produces data on the price of minerals. Shown here are the average
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Gold ($ per oz.) 161.1 308.0 613.0 460.0 376.0 424.0 361.0 318.0 368.0 448.0 438.0 382.6 Copper (cents per lb.) 64.2 93.3 101.3 84.2 72.8 76.5 66.8 67.0 66.1 82.5 120.5 130.9 Silver ($ per oz.) 4.4 11.1 20.6 10.5 8.0 11.4 8.1 6.1 5.5 7.0 6.5 5.5 Aluminum (cents per lb.) 39.8 61.0 71.6 76.0 76.0 77.8 81.0 81.0 81.0 72.3 110.1 87.8
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Business Statistics For Contemporary Decision Making
ISBN: 978-1118749647
8th edition
Authors: Black Ken
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