An electronics firm was experiencing high rejections in their multiple connector manufacturing departments. "p" charts were introduced as part of a program to reduce defectives. Control limits were based on prior history, using the formula:
P' is the historical value of percent defective and n is the number of pieces inspected each week. After six weeks, the following record was accumulated
1,000 pieces were inspected each week in each department. Which department(s) exhibited a point or points out of control during this period (round off calculations to nearest tenth of a percentage point)?
If the probability of a success on a single trial is 0.2 and 3 trials are performed, what is the probability of at least one success?
According to Tchebysheff's theorem what % of measurements must lie within 2.5 standard deviations of the mean?
What distribution is used to determine the OC curve for an attributes sampling plan?
