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Mathematics, 22.01.2020 02:31 lizdeleon248

In a study of plant safety, it was found that the time it took for machine operators to react to a warning light was normally distributed with a mean 1 second and standard deviation 0.3 second. suppose a warning light visible to 4 operators goes on. what is the probability that the average (mean) reaction time of the 4 operators exceeds 1.25 seconds?

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