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4. The following data represent the operating times in hours for three types of scientific pocket calculators before recharge is required Calculator A 4.9 6.1

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4. The following data represent the operating times in hours for three types of scientific pocket calculators before recharge is required Calculator A 4.9 6.1 4.3 4.6 5.3 Calculator B 5.5 5.4 6.2 5.8 5.5 5.2 4.8 Calculator C 6.4 6.8 5.6 6.5 6.3 6.6 Use a 0.05 level of significance, to test the hypothesis that the operating times for all three calculators are equal

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