Stats Solutions

[Solution] A random sample of 56 lithium batteries has a mean life of 645 hours. A leading consumer journal states that the mean life for these batteries


Question: A random sample of 56 lithium batteries has a mean life of 645 hours. A leading consumer journal states that the mean life for these batteries is μ = 639 hours with \(\sigma \) = 31 hours. The manufacturer claims that based upon the sample results, their batteries last longer. Test the manufacturer's claim at the α = 0.04 level of significance.

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