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64 The following observations are on time h for a AA 1 5 volt alkaline...

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64 The following observations are on time h for a AA 1 5 volt alkaline battery to reach a 0 8 voltage Comparing the Lifetimes of Two Brands of Batteries J of Statistical Educ 2013 online Energizer Ultracell 8 65 8 74 8 91 8 76 8 81 8 52 8 62 8 68 8 76 8 68 8 64 Normal probability plots support the assumption that the population distributions are normal Does the data suggest that the variance of the Energizer population distribution differs from that of the Ultracell population distribution Test the relevant hypotheses using a sig nificance level of 05 Note The two sample test for equality of population means gives a P value of 763 The Energizer batteries are much more expensive than the Ultracell batteries Would you pay the extra money Energizer Ultracell 8 85 8 73 8 70 8 86 8 79

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