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Upper and lower control limits for /x- and R-charts

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Find the upper and lower control limits for /x- and R-charts for the width of a chair seat when the sample grand mean (based on 30 samples of 6 observations each) is 27.0 inches, and the average range is 0.35 inches.

© BrainMass Inc. brainmass.com September 25, 2018, 2:03 am ad1c9bdddf - https://brainmass.com/math/calculus-and-analysis/upper-and-lower-control-limits-for-x-and-r-charts-170261

Solution Preview

Since sample size= 6
A2= 0.48
D3= 0
D4= 2.00

Mean of ...

$2.19