Examine the Statistical Process Control outputs below. Answer the following questions
a. What is the sample size?
b. What is the number of samples?
c. What is the mean of sample 8; what is the range of sample 10?
d.. Is this process in control? Explain--a simple Yes or No is insufficient.
e. What additional steps should the quality assurance team take?
a. The sample size is 4.
b. ten samples were taken.
c. The mean of sample 8 is 12.175; the range of sample 10 is 0.5.
d. The process is not in control–while all means are within limits, the range for sample 3 is too large.
e. Investigate for assignable cause and eliminate that cause.
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