The mean life of a certain computer hard disk in continual use is 8 years. (a) How long a warranty should be offered if the vend
or wants to ensure that not more than 10 percent of the hard disks will fail within the warranty period? (Round your answer to 4 decimal places.) Period of warranty years (b) How long a warranty should be offered if the vendor wants to ensure that not more than 20 percent of the hard disks will fail within the warranty period? (Round your answer to 4 decimal places.) Period of warranty years
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