The flashlight batteries produced by one of the northern manufacturers are known to have an average life of 60 hours with a standard deviation of 4 hours.Use Chebyshev's theorem to answer the following questions.
a.At least what percentage of flashlights will have a life of 54 to 66 hours?
b.At least what percentage of the batteries will have a life of 52 to 68 hours?
c.Determine an interval for the batteries' lives that will be true for at least 80% of the batteries.(Hint: First compute the Z-score. )

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The Answer of The flashlight batteries produced by one of the northern manufacturers are known to have an average life of 60 hours with a standard deviation of 4 hours.Use Chebyshev's theorem to answer the following questions.
a.At least what percentage of flashlights will have a life of 54 to 66 hours?
b.At least what percentage of the batteries will have a life of 52 to 68 hours?
c.Determine an interval for the batteries' lives that will be true for at least 80% of the batteries.(Hint: First compute the Z-score. )

The Flashlight Batteries Produced by One of the Northern Manufacturers