Question: A quality control engineer working for a light bulb manufacturing company believes that the company is overestimating the average lifetime for a specific type of

A quality control engineer working for a light bulb manufacturing company

believes that the company is overestimating the average lifetime for a specific

A quality control engineer working for a light bulb manufacturing company believes that the company is overestimating the average lifetime for a specific type of fluorescent light bulbs. The company states that the average lifetime, [1,, is 1600 hours and the standard deviation is 0' = 120 hours. However, the engineer believes it is 1580 hours. In order to determine the validity of the engineers claims, a sample of 100 bulbs is taken and the mean lifetime is computed to be 1570 hours. Run a hypothesis test to determine the validity of the engineers claims with a significance level of a = 0.05. Hint: You will need to (1) State your hypotheses and all relevant parameters, (2) Find the critical value for the test, and (3) make your conclusions

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