What proportions of screens have a life between range

Reference no: EM13137378

most computer monitors screens eventually wear out. the life of this particular brand or monitor is normally distriubuted with a mean life of 2000 hours and a standard deviation of 350 hours. the manufacturer is considering a warranty. what proportions of the screens have a life between 1500 and 2500 hours?

Reference no: EM13137378

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