SOLUTION: A sample of 50 batteries is taken and useful lifespans are reported. What is the probability that the sample mean useful lifespan is over 115,000 miles?

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Question 980351: A sample of 50 batteries is taken and useful lifespans are reported. What is the probability that the sample
mean useful lifespan is over 115,000 miles?

Answer by Fombitz(32388) About Me  (Show Source):
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