Mathematics, 22.01.2021 01:00 hiihihihij
A manufacturer of TV tubes has for many years used a process giving a mean tube life of 4700 hours and a standard deviation of 1460 hours. A new process is tried to see if it will increase the life significantly. A sample of 100new tubes gave a mean life of 5000 hours. Is the new process better than the old one at a 1% level of significance?
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A manufacturer of TV tubes has for many years used a process giving a mean tube life of 4700 hours a...
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