On what basis does Duracell, manufacturer of high-performance alkaline batteries, differentiate itself from its competitors? Group of answer choices Durability Style Service Performance
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Step 1: Read the question carefully and note that it asks on what basis Duracell differentiates itself from its competitors, with four choices: Durability, Style, Service, Performance. Show more…
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Two brands of car batteries, both carrying 6-year warranties, were sampled and tested under controlled conditions. Five of each brand failed after the number of months shown. Calculate both sample means and standard deviations. Determine which brand battery lasts longer and which brand has the more consistent lifetime. Brand A: 66, 76, 75, 71, 69 Brand B: 71, 65, 66, 66, 71 What are the sample means? What are the sample standard deviations? (Round to the nearest hundredth) Which brand battery apparently lasts longer? Brand A Brand B Which brand battery has the more consistent lifetime? Brand B Brand A
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Energizer is gaining market share against competitor Duracell and its profit is rising despite the sharp rise in the price of zinc, a key battery ingredient. Source: www.businessweek.com, August 2007 In what type of market are batteries sold? Explain your answer.
An article in the November 1983 Consumer Reports compared various types of batteries. The average lifetimes of Duracell batteries and Eveready Energizer Alkaline AA batteries were given as 4.1 hours and 4.5 hours, respectively. Suppose the sample average lifetime of 100 Duracell batteries is X and the sample average lifetime of 100 Eveready batteries is Y. What is the mean value of X - Y (i.e., where is the distribution of X - Y centered)? Does your answer depend on the specified sample sizes? The answer increases as the sample size decreases. The answer increases as the sample size increases. The answer decreases as the sample size increases. The answer decreases as the sample size decreases. The answer is the same irrespective of the sample sizes. Suppose the population standard deviations of lifetime are 1.5 hours for Duracell batteries and 2.0 hours for Eveready batteries. With the sample sizes given in part (a), what is the variance of the statistic X - Y and what is its standard deviation? Round your answers to four decimal places.
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