Determine control limits for a c-chart and np-chart, Operation Management

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1. If, instead, a constant sample size of 100 is chosen, determine the np-chart control limits. A later sample produces 15 defectives: what conclusion can be drawn? 

2. 1000 bottles produced by a stable process are inspected for air bubble defects, and 2350 such defects are found. Determine the control limits for a c-chart.


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