A Point Which Is Outside of the Lower Control Limit

question 76

Multiple Choice

A point which is outside of the lower control limit on an R-chart

• A)is an indication that no cause of variation is present.
• B)should be ignored because it signifies better-than-average quality.
• C)should be investigated because an assignable cause of variation might be present.
• D)should be ignored unless another point is outside that limit.
• E)is impossible since the lower limit is always zero.

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