SOLUTION: A random sample of 100 batteries was tested for length of life. The results were a mean of 500 hours and a standard deviation of 10 hours. What percent of the batteries will last 5

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Question 449365: A random sample of 100 batteries was tested for length of life. The results were a mean of 500 hours and a standard deviation of 10 hours. What percent of the batteries will last 590 hours or less?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
590 hours is 9 standard deviations.
All of them.