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3. A manufacturer of television sets is interested in the effect on tube conductivity of four different types of coatings for color picture tubes. A completely randomized experirnent is conducted and the following conductivity data an obtained: Coating Iype Conductivity (Yi) 143 141 150 146 143 127 152 149 137 134 136 132 4 129 127 132 129 (a)Write down the classical model associated with this experiment. Please make sure you label all symbols used (b) Write down the null and alternative hypotheses you will test to find out if there is strong evidence to suggest that at least one coating type has a mean conductivity that is different from that of the other coatings. (c) Compute SSTotal, SSTreatment, and SSError and complete the ANOVA table given below (d) Test the hypotheses you specified in part (b) at 0.05 significance level and state your conclus1on5

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