Question

Penn State Fleet which operates and manages car rentals for Penn State employees found that the tire lifetime for their vehicles has a mean of 5000 miles and standard deviation of 350 miles. For a random sample of 20 vehicles taken from a normal population what is the probability that the sample mean lifetime of these vehicles is
a) More than 5200 miles?
b) Below 4900 miles?
c) Between 4900 and5200 miles?

Answer 1

Answer:

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