Determine the upper control limit for an r chart

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Reference no: EM13100627

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 4.4. TABLE (Points : 5)
UCL = 9.3016
UCL = 1.4696
UCL = 11.3256
UCL = 8.8176

Reference no: EM13100627

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