twenty samples of subgroup size 3 n3 were


Twenty samples of subgroup size 3 (n=3) were collected for a variable measurement. Determine the upper control limit (UCL) for an R-chart if the mean of the sample ranges equals

UCL = 9.3016

UCL = 1.4696

UCL = 11.3256

UCL = 8.8176

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Operation Management: twenty samples of subgroup size 3 n3 were
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