The manufacturer of batteries used in small electric appliances wants to estimate the average life of a
Question:
The manufacturer of batteries used in small electric appliances wants to estimate the average life of a battery. A random sample of 12 batteries yields x-bar = 34.2 hours and s = 5.9 hours. Give a 95% confidence interval for the average life of a battery.
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n 12 342 s 59 ...View the full answer
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