A Precision Parts Manufacturer Produces Bolts for Use in Military $37.50 \pm 0.25 \mathrm{~cm}$

Multiple Choice

A precision parts manufacturer produces bolts for use in military aircraft. The specifications for bolt length are $37.50 \pm 0.25 \mathrm{~cm}$ . The company has established an $\bar{x}$ -chart and an $R$ -chart using samples of size five. The centerlines for the $\bar{x}$ chart and $R$ -chart are set at $37.65 \mathrm{~cm}$ and $1.03 \mathrm{~cm}$ , respectively. What is the value of $C_{p k}$ for this process?

A) 0.08
B) 0.28
C) 0.75
D) 0.03