The weight percent of silicon in six different rock samples, each containing different amounts of silicon, was measured by two different methods. The results are given in the table. Sample Method A Si wt% | Method B Si wt% 1 11.570 11.500 15.380 15.350 3 17.950 17.880 4 22.840 22.810 5 25.110 25.200 6 27.070 27.050 Determine tcalc •

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