Consider a P-Chart Measuring the Percentage of Defective Light Bulbs

question 21

Multiple Choice

Consider a p-chart measuring the percentage of defective light bulbs. If the LCL is .04 and a sample has 1% defects, what is the implication?

• A) The process is in a state of control.
• B) The process is out of control even though the variation is "good."
• C) The value of sigma must be increased.
• D) The process has too many errors.
• E) A calculation error must have occurred.

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