The ____ states that if seven data points in a row are all below the mean, above the mean, or are all increasing or decreasing, then the process needs to be examined for non-random problems.

The ____ states that if seven data points in a row are all below the mean, above the mean, or are all increasing or decreasing, then the process needs to be examined for non-random problems.



a. ten run rule
b. six 9s of quality rule
c. seven run rule
d. Six Sigma rule


Answer: seven run rule


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