Answered You can hire a professional tutor to get the answer.
A state University uses thousands of fluorescent light bulbs each year. The brand of bulb it currently uses has a mean life of 890 hours.
A state University uses thousands of fluorescent light bulbs each year. The brand of bulb it currently uses has a mean life of 890 hours. A competitor claims that its bulbs, which cost the same as the brand the university currently uses, have a mean life of more than 890 hours. The university has decided to purchase the new brand if, when tested, the evidence supports the manufacturer's claim at the 0.05 Â significance level. Suppose 23 bulbs were tested with the following x=915 hours, and S=84 hours. at 5% significance level find the correct rejection region
