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Question: a phone manufacturer wants to compete in the touch screen...

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A phone manufacturer wants to compete in the touch screen phone market. He understands that the lead product has a battery life of just 5 hours. The manufacturer claims that while the new touch screen phone is more expensive, its battery life is more than twice as long as that of the leading product. In order to test the claim, a researcher samples 45 units of the new phone and finds that the sample battery life averages 10.5 hours with a sample standard deviation of 1.8 hours. (You may find it useful to reference the appropriate table: z table or ttable) a. Select the relevant null and the alternative hypotheses H0: μ 10; HA: μ < 10 b-1. Calculate the value of the test statistic. (Round intermediate calculations to at least 4 decimal places and final answer to 3 decimal places.) Test statisticb-2. Find the p-value. Op-value <0.01 0.01 s p-value<0.025 0.025 s p-value 0.05 0.05 sp-value < 0.10 s p-value <O O p-value 2 0.10 C. At the 5% significance level, what is the conclusion? OReject Ho: the claim is supported by the data. Reject Ho; the claim is not supported by the data. Do not reject Ho: the claim is supported by the data. ODo not reject Ho; the claim is not supported by the data.

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