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Table 5.1 Factors for Calculating Three-Sigma Limits for the X Chart and R-Chart Factor for UCL Factor for Factor for Size of and LCL for LCL for UCL for Sample x-bar-Charts R-Charts R-Charts (n D3 DA 1.880 0 3.267 1.023 0 2.575 0.729 0 2.282 0.577 0 2.115 0.483 0 2.004 0.419 0.076 1.924 0.373 0.136 1.864 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. Historically, the average diameter of the holes drilled has been 0.25 cm and the average range has been 0.1 cm. Determine the central line and upper and lower control limits for an x and an R-chart, assuming samples of size 8 will be taken. Use Table 5.1. For the R-chart, what is the value of the UCLR? O Less than or equal to 0.1000 Greater than 0.1000 but less than or equal to 0.1510 O Greater than 0.1510 but less than or equal to 0.2020 Greater than 0.2020