Probability that the mean life-span of a sample

Reference no: EM1322517

Find the probabilities values based on normal distribution

A light bulb manufacturer claims that their bulbs have a mean life-span of 720 hours with a standard deviation of 80 hours. What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?

Reference no: EM1322517

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