Question: Factors for Calculating Three-Sigma Limits for the Chart and R-Chart Factor for UCL Factor for Size of Factor for LCL for R-Charts UCL for and

Factors for Calculating Three-Sigma Limits for

Factors for Calculating Three-Sigma Limits for the Chart and R-Chart Factor for UCL Factor for Size of Factor for LCL for R-Charts UCL for and LCL for x-bar-Charts Sample R-Charts (x) A2 D3 D4 2 1.880 10 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 10 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.337 0.184 1.816 10 0.308 0.223 1.777 Source: 1950 ASTM Manual on Quality Control of Materials, copyright American Society for Testing Materials. Reprinted with permission. The defect rate for a product has historically been about 5.0%. What is the upper control chart limit if you wish to use a sample size of 50 and 3-sigma limits? A) 0.172 B) 0.142 C) 0.112 D) 0.082

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