Question 1
If a sample of items is taken and the mean of the sample is outside the control limits the process is
◦ producing high quality products.
◦ in control, but not capable of producing within the established control limits.
◦ within the established control limits with only natural causes of variation.
◦ out of control and the cause should be established.
◦ monitored closely to see if the next sample mean will also fall outside the control limits.
Question 2
The causes of variation in statistical process control are
◦ Type I and Type II.
◦ cycles, trends, seasonality, and random variations.
◦ producer's causes and consumer's causes.
◦ mean and range.
◦ natural causes and assignable causes.