Question: 1 . The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of

1 . The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFL's is different from 7,539 hours. The population standard deviation is 840 hours. A random sample of 49 light bulbs indicates a sample mean life of 7,359 hours. Use a=0.01. Answer the following questions. Identify the claim and state the HO and H1. ii. Find the critical value. 111. Calculate the test statistic. iv. Make a decision to reject or fail to reject the Ho. V. Interpret the decision in the context of the original claim

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