The following data show the price of silver and the price of tin over a recent 9-year

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The following data show the price of silver and the price of tin over a recent 9-year period. Find the range, variance, and standard deviation. Which data set is more variable?

Silver                            Tin
23.80                         13.40
31.21                         12.83
35.24                         15.75
20.20                         12.40
14.69                           8.37
15.00                         11.29
13.41                           8.99
11.57                           5.65
7.34                            4.83

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