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 lives of the batteries that will be true for at least 80% of the batteries. (Hint: First compute the Z-score.)
What will be an ideal response?
| a. | 56% |
| b. | 75% |
| c. | 60 + (2.236)(4). This indicates that at least 80% of the batteries will have lives of 51.056 to 68.944 hours. |
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