A Life test on a large number of type D alkaline batteries revealed that the mean life
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Question:
A Life test on a large number of type D alkaline batteries revealed that the mean life for a particular use before failure is 19.0 hours and the standard deviation of the distribution was 1.2 hours.
- Determine the area between 17.8 hours and 20.2 hours.
- Determine the area to the right of16 hours
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