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.
Answer: b