Question: computer chip production process yields DRAM chips with an average life of 1 , 8 0 0 hours and sigma = 1 0 0 hours.

computer chip production process yields DRAM chips with an average life of 1,800hours
and sigma =100 hours. The tolerance upper and lower specification limits are 2,400 hours and
1,600 hours, respectively. Is this process capable of producing DRAM chips to specification
with 3-sigma quality? If not, what is the source of failure, too much variation or a non-centred
distribution?

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