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The life in hours of a biomedical device is known to be approximately normally dis- tributed. A random sample of n = 14 devices is

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The life in hours of a biomedical device is known to be approximately normally dis- tributed. A random sample of n = 14 devices is selected and found to have an average life of x = 5620 hours and a sample SD of s = 220 hours. Construct a 99% Prediction Interval for the life of a new device

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