Cartridges fail to meet up the guaranteed time usage


A certain printer cartridge has demonstrated a mean time usage of 9 hours and a standard deviation of 22 minutes. What time usage guarantee (in hours) should the manufacturer advertise in order to ensure that only 4% of the cartridges fail to meet the guaranteed time usage?

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Basic Statistics: Cartridges fail to meet up the guaranteed time usage
Reference No:- TGS0112379

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