Enough evidence to support the manufacturer claim

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An automotive battery manufacturer guarantees that mean reserve capacity of a certain battery is greater than 1.5 hours. To test this claim, you randomly select a sample of 50 batteries and find the mean reserve capacity to be 1.55 hours with a standard deviation of 0.32 hours. At a=0.10, do you have enough evidence to support the manufacturer's claim?

Reference no: EM132432479

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