Historically the average proportion of defective bars has been Samples

Question

Historically, the average proportion of defective bars has been 0.015. Samples will be of 100 bars each. Construct a p-chart using z = 3. What is the value of UCL?

A) less than or equal to 0.050

B) greater than 0.050 but less than or equal to 0.060

C) greater than 0.060 but less than or equal to 0.070

D) greater than 0.070

Answer

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