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Confidence interval for the population mean battery life

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Reference no: EM132401530

A cell phone manufacturer would like to claim that the battery in its newest model will power the phone for 15 hours of continuous use. (Note: this would be a credible claim if they could guarantee at least 15 hours in battery life). A random sample of 35 phones subjected to testing yielded a mean battery life of 15.9 hours with a standard deviation of 2.2 hours.

Develop a 95% confidence interval for the population mean battery life.

Reference no: EM132401530

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