(c) Three standard chemical procedures are used to determine the copper content in a certain chemical compound. Each procedure was used 4 times on a given compound and the resulting data is shown in Table Q2 (c)(i). Complete the ANOVA in Table Q2(c)(ii) and test the hypothesis that the mean readings are the same for all three methods. Use the 5 percent level of significance. Method 1 Method 2 Method 3 Table Q2 (c)(ii): ANOVA of copper content measurements Sum of squares (SS) Source of variation Method Error Total Table Q2 (c)(i): Copper content 76.43 78.61 80.4 78.22 80.4 82.24 72.7 76.04 82.16 84.14 80.2 81.33 df 9 11 111.53 Mean of squares (MS) 19.858 Fo 2.49

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