A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 726 hours. A random sample of 30 light bulbs has a mean life of 714 hours. Assume the population is normally distributed and the population standard deviation is 56 hours. At α = 0.08, do you have enough evidence to reject the manufacturer's claim? Complete parts (a) through (e). (a) Identify the null hypothesis and alternative hypothesis. Ο Α. Ηγ: μ=714 Ha: #714 (claim) ... O D. Ho: μ#726(claim) Ha: μ = 726 B. Ho: <714 (claim) Hg: μ2714 O E. Ho: μ ≥726 (claim) Ha: μ<726 OC. Ho: H≤714 Ha: μ> 714 (claim) OF. Ho: μ>726 Ha: μ≤726 (claim)

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