(Answered) Question regarding the select a random sample

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A company claims that the mean battery life for their MP3 players is at least 30 hours. You suspect that this claim is incorrect - to test the claim, you select a random sample of 18 MP3 players, and find that the sample has mean battery life is 28.5 hours, with a standard deviation of 1.7 hours.

Based on this sample data, is there enough evidence at the α = .01 significance level to reject the manufacturer's claim?

a. No, because the test statistic is not in the rejection region.

b. Yes, because p = .0008 is less than the significance level.

c. No, because p = .0007 is greater than the test statistic.

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