Question: Problem 2. (3.5 points) If we define a convenient unit (convenient unit for monitoring chart) =200 boards and the sample size is n=3. (a) How

Problem 2. (3.5 points) If we define a convenient unit (convenient

Problem 2. (3.5 points) If we define a convenient unit (convenient unit for monitoring chart) =200 boards and the sample size is n=3. (a) How many boards should be checked at each sampling time? ( 0.5 point) (b) Assume in control Phase I data, we found 30 defects in 500 boards, what are the estimated C0 and u0 ? (0.5 point ) (c) What is Type I error in the 2 -sigma c and u control charts? (Think about the relationship between c and u charts) (1.5 point) (d) What is Type II error in the 2 -sigma u chart if the process is changed into 50 defects in 500 boards? point)

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