a) \(UCL = \bar{\bar{x}} + A_3 \bar{s}\)
b) \(UCL = \bar{\bar{x}} – A_2 \bar{s}\)
c) \(UCL = \bar{\bar{x}} – A_3 \bar{s}\)
d) \(UCL = \bar{\bar{x}} + A_2 \bar{s}\)
What is the formula for UCL for x bar chart when s is known?
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answerhappygod
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What is the formula for UCL for x bar chart when s is known?
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