If the lower-control limit of a P chart is negative,
a. a mistake has been made in the computations
b. use the absolute value of the lower limit
c. it is set to zero
d. None of these alternatives is correct.
Question 2
A control chart that is used when the output of a production process is measured in terms of the percent defective is
a. a P chart
b. an X bar chart
c. a process chart
d. None of these alternatives is correct.