Imagine a company wants to test the claim that their batteries last more than 40 hours. Using a simple random sample of 15 batteries yielded a mean of 44.9 hours, with a standard deviation of 8.9 hours. Test this claim using a significance level of 0.05. (State the null and alternative hypotheses)
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The null hypothesis (H0) is a statement of no effect or no difference. In this case, it would be that the mean battery life is 40 hours or less. The alternative hypothesis (H1 or Ha) is what you want to prove, which is that the mean battery life is more than 40 Show more…
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