Question

Consider the data set shown in Table 18.5.3, representing the thicknesses of a protective coating.
a. Find the average, X, and the range, R, for each sample.
b.* Find the overall average, X, and the average range, R.
c.* Find the center line for the X chart.
d.* Find the control limits for the X chart.
e. Draw the X chart.
f. Comment on what you see in the X chart. In particular, is this process in control? How do you know?
g. Write a paragraph, as if to your supervisor, summarizing the situation and defending the action you feel is appropriate.
QUESTION CONTINUE TO NEXT PAGE…….


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  • CreatedNovember 11, 2015
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