$$\text { Factors for Calculating Three- Sigma Limits for the } \overline { \bar { X } } \text { - chart and } R \text { - chart }$$

question 187

Multiple Choice

$$\text { Factors for Calculating Three- Sigma Limits for the } \overline { \bar { X } } \text { - chart and } R \text { - chart }$$


-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 $\bar { X } -$ and an R- chart, assuming samples of size 8 will be taken. Use Table 7.1. For the R- chart, what is the value of the LCL_R?

• A) less than or equal to 0.010
• B) greater than 0.010 but less than or equal to 0.020
• C) greater than 0.020 but less than or equal to 0.030
• D) greater than 0.030

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