The average battery life of 2800 manufactured cell phones is recorded and normally distributed. The mean battery life is 12 hours with a standard deviation of 1.3 hours. Find the number of phones who have a battery life in the 12 to 13.3 range. ∗ * Round your answer to the nearest integer. * *Do not include commas in your answer.
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Home » Mathematics » The average battery life of 2800 manufactured cell phones is recorded and normally distributed. The mean battery life is 12 hours with a standard deviation of 1.3 hours. Find the number of phones who have a battery life in the 12 to 13.3 range.