Mathematics, 31.07.2019 23:20, curtisepps

Acompany has developed a new type of light bulb, and wants to estimate its mean lifetime. a simple random sample of 12 bulbs had a sample mean lifetime of 673 hours with a sample standard deviation of 75 hours. it is reasonable to believe that the population is approximately normal. find the lower bound of the 95% confidence interval for the population mean lifetime of all bulbs manufactured by this new process.

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Acompany has developed a new type of light bulb, and wants to estimate its mean lifetime. a simple r...

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