Question: X - bar control chart was examined and no data points fell outside of the limits . Can this pro control? ( 1 ) Not

X-bar control chart was examined and no data points fell outside of the limits. Can this pro control? (1) Not yet, there could still be a pattern to the points in the X-bar chart indicating abnormalities that n (2) Not yet, the R-chart must also be checked Not yet, the number of samples must also be known Yes Both options (1) & (2) above

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