In a manufacturing industry the plate thickness is one of the important CTQ factor. This industry wants to establish Xbar and R control charts on the production process. The resulting data from 20 sets of plate thickness samples with a subgroup size of 4 that were measured are: 20 20 X¡ = 20.883 R¡ = 3.733 i=1 a. Find the control limits that should be used on the Xbar and R control charts. b. Assume that the 20 preliminay samples plot in control on both charts. Estimate the process mean and standard deviation.
In a manufacturing industry the plate thickness is one of the important CTQ factor. This industry wants to establish Xbar and R control charts on the production process. The resulting data from 20 sets of plate thickness samples with a subgroup size of 4 that were measured are: 20 20 X¡ = 20.883 R¡ = 3.733 i=1 a. Find the control limits that should be used on the Xbar and R control charts. b. Assume that the 20 preliminay samples plot in control on both charts. Estimate the process mean and standard deviation.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 94E
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