Construct an X-bar chart using the standard deviation of the observa- tions to estimate the….
Construct an X-bar chart using the standard deviation of the observa-
tions to estimate the population standard deviation. Construct an X-
bar chart and R-chart using the range to calculate the control limits.
(The Excel template on the companion web site will do this for you.)
b. Is the process in control? Explain.
c. If the clinicians feel that any time over 100 minutes is unacceptable,
what are the C p and C pk of this process?
d. What are the next steps for the laboratory manager?