iPhone 6 battery life ~ The life of a fully charged iPhone 6 is normally distributed...

iPhone 6 battery life ~ The life of a fully charged iPhone 6 is normally distributed with an average of 13 hours and a standard deviation of 1.5 hours.

What is the life of a fully charged iPhone 6 battery for the 20th percentile? Enter your answer to 4 decimal places.

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orchestra answered 1 year ago

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