Auto manufacturers buy car components from suppliers who deliver them to the assembly line. A manufacturer can schedule staff time to check a sample of 5 parts a day for defects or a sample of 25...

Auto manufacturers buy car components from suppliers who deliver them to the assembly line. A manufacturer can schedule staff time to check a sample of 5 parts a day for defects or a sample of 25 parts over the weekend when the assembly line is slowed.

(a) If the manufacturer is interested in finding a flaw that shows up rarely, which approach will have a better chance of finding it?

(b) What if the manufacturer is concerned about a problem that will be evident and persistent?