A consumer council investigates the battery life (in hundred hours) of a smart phone. A random sample of eight batteries

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A consumer council investigates the battery life (in hundred hours) of a smart phone. A random sample of eight batteries

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A Consumer Council Investigates The Battery Life In Hundred Hours Of A Smart Phone A Random Sample Of Eight Batteries 1
A Consumer Council Investigates The Battery Life In Hundred Hours Of A Smart Phone A Random Sample Of Eight Batteries 1 (43.7 KiB) Viewed 34 times
A consumer council investigates the battery life (in hundred hours) of a smart phone. A random sample of eight batteries was selected. The measurements of their battery life were recorded as follows: 83 78 65 69 77 71 72 81 a. What is the interval estimation of the population mean battery life with 90% level of confidence? To construct the confidence interval, what assumption about the population is needed?
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