Question
Twenty-five samples of 100 items each were inspected when a process was considered to be operating...
Twenty-five samples of 100 items each were inspected when a process was considered to be operating satisfactorily. In the 25 samples, a total of 180 items were found to be defective.
(a)What is an estimate of the proportion defective when the process is in control?
_________________.
(b)What is the standard error of the proportion if samples of size 100 will be used for statistical process control? (Round your answer to four decimal places.)
________________.
(c)Compute the upper and lower control limits for the control chart. (Round your answers to four decimal places.)
UCL=________.
LCL=_________.
For an acceptance sampling plan with n = 31 and c = 0,find the probability of accepting a lot that has a defect rate of 2%. (Round your answer to four decimal places.)
______________.
What is the probability of accepting the lot if the defect rate is 6%? (Round your answer to four decimal places.)
________________.
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