The following are the numbers of defective solder joints
Chapter 15, Problem 51E(choose chapter or problem)
The following are the numbers of defective solder joints found during successive samples of 500 solder joints:
(a) Using all the data, compute trial control limits for a fraction-defective control chart, construct the chart, and plot the data.
(b) Determine whether the process is in statistical control. If not, assume that assignable causes can be found and out-of-control points eliminated. Revise the control limits.
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