Question: 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

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):

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 significance level of .05.
The Energizer batteries are much more expensive than the Ultracell batteries. Would you pay the extra money?

Energizer 8.65 8.748.91 8.72 8.85 8.76 8.81 8.81 8.70 8.73 Ultracell: Energizer:8.52 8.62 8.68 8.86 Ultracell: 8.76 8.68 8.64 8.79

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The sample standard deviations are s 1 0127 and s 2 0060 For the hypotheses H 0 1 2 versus ... View full answer

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